The lightweight design and improvement of aluminum alloy automobile wheel
孙靖超_拓扑优化让植入体融入你的身体
拓扑优化，让植入体融入你的身体使用solidThinking Inspire义齿金属桥结构优化Let implant become a part of human body Dental implant structure topology optimization basedon solidThinking Inspire孙靖超（澳汰尔工程软件（上海）有限公司上海 200082）摘要：随着计算机硬件和软件性能的提升，利用计算机辅助设计以及制作（CAD/CAM）牙齿修复体，已经成为了一些医疗研究机构研发的重要手段。
本文采用solidThinking Inspire软件，对义齿支撑金属桥进行结构优化和探索设计优化。
希望能通过，拓扑优化的方法，在满足强度的前提下，尽可能地达到轻量化设计。
通过模拟优化结果显示，在保留材料10%-20%的时候，义齿支撑金属桥可以满足强度要求，并且重量最轻。
solidThinking Inspire凭借其界面易用，操作便捷，优化速度快等优点，满足义齿支撑金属桥结构设计探索的要求。
关键词：轻量化设计拓扑优化植入体牙科Abstract: Following the improvement of computer both of hardware and software performance, the CAD/CAM technology more and more plays an important roles on medical implant design. Based on solidThinking Inspire software, this work studies topology optimization of the dental metal bridge structure and explored its best design. According to the simulation results, the structure could ensure the hardness and achieve the lightweight desing at the same time. solidThinking Inspire, with its interface and easy to use, convenient operation, and the advantages of fast speed, could be a good solution to satisfy the requirements of the dental support metal bridge structure design. Key words: Lightweight design, topology optimization, dental implant1 植入系统研发的困惑随着计算机硬件和软件性能的提升，利用计算机辅助设计以及制作（CAD/CAM）牙齿修复体，已经成为了一些医疗研究机构研发的重要手段。
汽车结构的轻量化设计措施分析
AUTOMOBILE DESIGN | 汽车设计时代汽车 汽车结构的轻量化设计措施分析贾朝贝郑州科技学院 河南省郑州市 450000摘 要： 汽车工业要发展，在目前必须要满足环保要求，汽车轻量化设计可实现节能减排，但轻量化设计不是单纯减重，而是要保证安全性能的前提下去减重，因而如何进行轻量化设计值得探索，本文中重点对此进行了分析讨论，探析了目前市面上主流的轻量化设计方法措施，仅供参考。
关键词：汽车 轻量化设计 方法措施轻量化在当前汽车设计制造产业当中是一个比较主流的方向，与新能源车具有相当的地位，在传统发动机技术发展陷入瓶颈，新能源汽车受限于电池的情况下，轻量化成为了一种非常关键的解决手段，通过轻量化来实现节能减排。
但汽车轻量化，不是单纯减轻汽车的重量，而是在减轻重量的同时提升性能，因此分析讨论如何去进行轻量化设计，具有非常典型的价值意义。
1 轻量化设计概述1.1 轻量化产生背景轻量化设计是目前国内外汽车设计制造技术中的主要发展方向之一，与环保和安全具有同等地位，随着人们环保意识增强，汽车工业要发展，必须要走可持续发展道路，而可持续发展显然必须要实现节约资源、减少消耗，对于汽车工业而言，要达到相关要求，已经得到公认的路径包括提高发动机效率、新能源和轻量化。
汽车的节能环保通常情况下是降低油耗或提高燃油效率，降低或者清洁排放尾气。
在提高发动机效率方面，由于传统发动机不管是柴油机还是汽油机，实际上都已经达到了一个相当高的水准，现阶段主要是通过对发动机进行微量调整并利用汽车电子技术来提高发动机的效率，但效果并不是很理想，仅仅只能说达标。
而新能源汽车在环保上的效果最佳，但是问题在于由于电池的限制，新能源车的发展还需要走很长的一段路，而轻量化技术，在保证汽车安全性的基础上去降低汽车的自重来实现能耗的下降，它可以作为提高发动机能效，甚至是新能源车能效的一种基础技术手段，在当前发动机技术、新能源车技术尚未出现巨大突破之前，轻量化将是节能减排的主流技术手段。
汽车行业冲压成本的控制方法
如图 5 所示。
·8·
降低冲压材料成本的方法
降低冲压的材料成本，就是要提高材料的利用
率，或者使用成本更低的材料进行冲压。
目前各大汽车厂为了提高材料利用率，降低生产
成本，各种传统的技术方法都有充分的应用，因此在
这里不再过多介绍，
只介绍几种有创新意义的方法。
新车型可以减少模具投资约 4%~8%。
（3）模具轻量化设计。
国内的模具设计一般都设计的结构比较复杂，作
为技术的管理人员，通过借鉴合资企业的工作经验，
推广日系汽车厂模具的简约设计理念，使模具尽可能
采用简约化的设计，减少模具重量，可以有效减少模
《模具制造》2021 年第 10 期
冲压技术管理上，根据新车型产销规划的不同，要求
个车型多组模具采用组合设计，合计可以减少约 8%~
12%上下投资。
如图 6 所示，经过分析，将尾门外板和后牌照外
件（尾门外板连接件）进行组合冲压，实现一副模具
的组合。
通过这种嵌件+并模的组合，仅上述模具就可以
减少约 100 万元投资，实现单个车型减少约 3%的投
资。目前，采用这一方案的模具已经进入量产状态。
比
（3）采用和推广新材料的应用。技术管理就是要
较大提高，
降低了单台成本。
可以考虑这一方法。
如个别零件的局部可能出现刚性不足。对于这些问题，
引导和管理着团队的技术创新，也要持续的关注社会
100
产的投资成本。通过持续的培育和扶持，来推进模具
120
3,000~4,000 万元。模具国产化，极大地降低了冲压生
图 1 模具通过控制筋板厚度、增加铸空的设计降低模具重量
波士顿电钳操作指南说明书
004 TDA26..GB/07/12Customer ServiceGreat BritainBosch Customer Service Grand Union House Old Wolverton Road Milton Keynes MK12 5PTUK +44 (0)844 892 8923IRL +353 (0)1450 2655(*) Model dependentYou can download this manual from the local homepages of BoschThank you for buying the TDA26 steam iron from Bosch. This iron has a lightweight design and is built to perform.These instructions contain valuable information about the unique features of this iron and some hints to make ironing easier for you.Please visit for more product information or to register your product, just follow the link to the Online guarantee registration.Before using the Iron for the first timePlease carry out the following steps:1. Remove the protective cover from the soleplate before using the iron.2. While the iron is unplugged, fill the water tank (E) with tap water and set the temperature control (I) to “max” by lining it up with the pointer (H).3. Plug the appliance into the mains and when the iron has reached the correct temperature (the pilot light [K] goes out), set the steam regulator (A) to the “2” position.4. Hold the iron horizontally and repeatedly press the shot of steam button (L). Any residue should come out of the soleplate (G). It may smoke and smell – this is normal and will cease after a short while.5. If necessary, carefully clean the soleplate down with a dry, folded cloth.Cleaning and MaintenanceFor general cleaning, follow the information below:DO NOT de-scale or clean the water tank with cleaning products or solvents, as these could cause the iron to drip when using the steam function.DO NOT use a “professional steam cleaner” for cleaning the appliance.DO NOT use sharp objects or abrasive products to clean the soleplate or any other part of the appliance. To keep the soleplate in good condition, do not allow it to come into contact with metal objects.GUARANTEE TERMSThe terms of the guarantee for this appliance are in accordance with that stated by our representative for the country in which it is sold. Details of those conditions can be obtained from the retailer from whom the appliance was purchased. The SALES RECEIPT must be presented when making any claims against the terms of this guarantee. We reserve the right to make technical modifications.Environmental CareThis iron has been designed according to ecological criteria related to sustainable development; analysing its whole lifecycle, from material selection to its later reuse or recycling; evaluating the improvement possibilities from a technical, ecological and environmental point of view.Before throwing a used appliance away, you should make it noticeably inoperable e.g. cut off the mains lead and be certain to dispose of it in accordance with current laws and regulations.Your retailer, town council or local council can give you detailed information about these.This appliance is labelled in accordance with European Directive 2002/96/EG concerning used electrical and electronic appliances (waste electrical and electronic equipment – WEEE).The guideline determines the framework for thereturn and recycling of used appliances as applicable throughout the EU.ImportantThis iron has been designed according to ecological criteria, related to the sustainable development; analyzing its whole lifecycle, from material selection to its later reusing or recycling; evaluating the improvement possibilities, from a technical, economical and environmental point of view.This appliance has been designed exclusively for domestic use and must not be used for industrial purposes.Carefully read through the operating instructions for the appliance and safeguard them for future reference.General safety instructions• The iron must not be left unattended while it is connected to the supply mains.• Remove the plug from the socket before filling the appliance with water or before pouring out the remaining water after use.• The appliance must be used and placed on a stable surface.• When placed on its stand, make sure that the surface on which the stand is placed is stable.• The iron should not be used if it has been dropped, if there are visible signs of damage or if it is leaking water. It must be checked by an authorized Technical Service Centre before it can be used again.• With the aim of avoiding dangerous situations, any work or repair that the appliance may need, e.g. replacing a faulty mains cable, must only be carried out by qualified personnel from an Authorised Technical Service Centre.• This appliance can be used by children aged from 8 years and above and persons with reduced physical, sensory or mental capabilities or lack of experience and knowledge if they have been given supervision or instruction concerning use of the appliance in a safe way and understand the hazards involved. Children shall not play with the appliance. Cleaning and user maintenance shall not be made by children without supervision.• Keep the iron and its cord out of reach of children less than 8 years of age when it is energized or cooling down.• This appliance is to be connected and used in accordance with the information stated on its characteristics plate.• This appliance must be connected to an earthed socket. If it is absolutely necessary to use an extension cable, make sure that it is suitable for 16A and has a socket with an earth connection.• If the safety fuse fitted in the appliance blows, the appliance will be rendered inoperative. To restore normal operation the appliance will have to be taken to an authorised Technical Service Centre.• In order to avoid that, under unfavourable mains conditions, phenomena like transient voltage drops or lighting fluctuations can happen, it is recommended that the iron is connected to a power supply system with a maximum impedance of 0.27Ω . If necessary, the user can ask the public power supply company for the system impedance at the interface point.• The appliance must never be placed directly under the tap to fill the water tank.• Unplug the appliance from the mains supply after each use, or if a fault is suspected.• The electrical plug must not be removed from the socket by pulling the cable.• Never immerse the iron in water or any other fluid.• Do not leave the appliance exposed to weather conditions (rain, sun, frost, etc.)2 Filling the water tankSet the steam regulator (A) to the “0” position (no steam) bylining it up with the pointer (B) on the iron and unplug the ironfrom the mains!1. Place the iron at an angle of 45° with the point facing upwards.2. Fill the water tank (E) via the water tank inlet (C) but never above theDO NOT use condensation water from tumble dryers, air conditionersor similar appliances. This appliance has been designed to use normaltap water.To prolong the optimum steam function it is possible to mix tap waterwith distilled water 1:1. If the tap water in your district is very hard, mixtap water with distilled water 1:2.3The temperature control (I) adjusts the temperature of thesoleplate (G).1. Check the temperature instructions shown on the care label of thegarment you are ironing and set the temperature control (I) to thecorresponding position by lining it up with the temperature controlpointer (H) on the iron:the garment is made from mixed fabrics, set the temperature for themost delicate material.3. For silk, woollen or synthetic materials iron the reverse side of the fabricto prevent shiny patches. Avoid using the spray function to preventstains.4. Sort your garments based on their care labels, always starting withthose that have to be ironed at the lowest temperature.5. The pilot light on the top of the handle (K) will stay lit while the ironis heating up and go out once the selected temperature has beenreached. Wait for a few seconds after the light goes out before youstart ironing. Once the iron is ready, you can continue to iron even ifthe pilot lamp comes on again.6. If your iron has auto shut-off and the pilot light is flashing, the auto-shutoff has activated. Gently move the iron from side to side to restart it.4 Ironing with steamThe steam regulator (A) is used to adjust the amount of steamproduced when ironing.1. Make sure that there is water in the tank (E).2. Adjust the temperature control (I) and then set the steam regulator (A)according to the table below by lining it up with the steam regulator••13. You can get extra steam by pressing and holding the steam regulatorto avoid water dripping from the soleplate (G).5 Ironing with shot of steamThis can be used to remove stubborn wrinkles or to press in asharp crease or pleat. It cannot be used on a synthetic settingfor delicate items.1. Make sure that there is water in the tank (E).2. Set the temperature control (I) to the “•••” or “max” position and thesteam regulator (A) to the “2” position.3. Press the shot of steam button (L) on the handle repeatedly at intervalsof 5 seconds.6 Vertical steaming with shot of steamThis can be used to remove creases from hanging clothes,curtains etc. It cannot be used on a synthetic setting fordelicate items.WARNING! Do not vertical steam while the item is being worn.Never spray or aim steam at people or animals!1. Make sure that there is water in the tank (E).2. Set the temperature control (I) to the “•••” or “max” position and thesteam regulator (A) to the “2” position.3. Hold the iron in an upright position about 15 cm away from the garmentbeing steamed.4. Press the shot of steam button (L) on the handle at intervals of 5seconds, however, after 4 jets of steam, wait for 10 seconds to allow Using Your Iron。
电机解决方案英文
电机解决方案英文《Electric Motor Solutions》As technology continues to advance, the demand for efficient and reliable electric motors is increasing. From industrial machines to household appliances, electric motors play a crucial role in powering a wide range of devices. In order to meet these growing needs, companies are constantly striving to develop innovative motor solutions.One of the main challenges in the development of electric motors is to improve energy efficiency. In response to this, engineers are focusing on design improvements and the use of advanced materials to reduce energy losses and increase the overall performance of the motors. This has led to the development of high-efficiency motors that are not only more environmentally friendly, but also help to reduce operating costs for businesses and consumers.Another important aspect of electric motor solutions is the need for reliability. Whether it's in an industrial setting or in consumer electronics, the failure of a motor can lead to costly downtime and repairs. To address this issue, manufacturers are investing in advanced manufacturing processes and quality control measures to ensure that their motors meet strict performance and reliability standards.Moreover, as the demand for electric vehicles continues to grow, the development of efficient and compact motor solutions is becoming increasingly important. Companies are working oncreating lightweight and powerful motors that can deliver the performance needed for electric vehicles while also meeting the space and weight constraints of the vehicles.In addition to these technical advancements, the integration of smart technologies and connectivity into electric motors is also becoming a focus for many companies. By incorporating sensors and monitoring systems into their motors, manufacturers are able to gather important data on performance and predictive maintenance, helping businesses to optimize their operations and reduce downtime.In conclusion, the development of electric motor solutions is an ever-evolving field that requires constant innovation and improvement. The focus on energy efficiency, reliability, and the integration of smart technologies will continue to drive the development of new and improved electric motor solutions to meet the needs of various industries.。
产品混线装配产能不足原因分析及工艺改进
产品混线装配产能不足原因分析及工艺改进许锦泉(广西柳工机械股份有限公司，广西柳州545007)摘要：针对装载机和平地机在同一条生产线装配效率低的情况进行分析，找出这两种产品工序分配不统一、各人员工序内容分配不合理、人员效率低等的问题，通过改进工艺流程及工序平衡，对装配工艺进行优化和改善，降低了工人劳动强度，提高了装载机和平地机混线装配的生产效率，也为类似的混线装配优化提供参考。
关键词：生产线平衡;工艺布局优化；装配工艺改进中图分类号：F426文献标识码:A文章编号:1672-545X(2020)10-0160-04随着工程机械行业发展的不断成熟，市场竞争日趋激烈,如何提升企业的竞争力，已成为工程机械生产厂家的首要任务[1]o随着国外先进生产理念引进国内，如精益生产、工业工程、柔性制造等理念的导入，为装载机装配流水线生产的效率提升提供了很多作业及流程改进方法以及工具[2]o通过持续不断的工艺技术改进来推动企业生产的进步,达到节能、增效、降耗的目的。
在企业应对激烈竞争的过程中，公司将平地机与装载机并线，在试运行一段时间后发现生产能力不足、安全风险高等问题，本文通过对混装的生产线平衡、工艺布局特性以及装配过程的工艺研究，提出改进方法并予以实施,从而达到高效、低安全风险的生产要求。
1现状问题描述由于工程机械行业持续低迷，公司为了优化业务,积极应对行业寒冬,将平地机业务纳入装载机公司，鉴于平地机的产量及其结构特点，公司决定将平地机与多品种小批量的装载机安排在同一条生产线,指标为6台/天。
但问题接踵而至：1)对于这两种完全不同的产品，尚未有人熟悉它们的装配要求,装配不同的产品需安排不同的工人，造成一条线需要两批人；2)由于对物料不熟悉，没法区分，两种机型的物料只能分别摆放在不同的区域,物料摆放凌乱,需花费大量时间找料；(3)人员分工不合理,装配效率低，满足不了市场需求，员工经常加班加点才能完成当日的排产计划。
顶级跑鞋读后感英文250词
顶级跑鞋读后感英语作文1After reading about top-level running shoes, I was truly amazed and enlightened. These shoes are not just a piece of equipment, but a masterpiece of technology and design.When I put on a pair of these shoes during my own sports activities, I immediately felt the difference. The snug fit wrapped around my feet like a second skin, providing excellent support and cushioning. Every step felt effortless, and I could sense the seamless combination of comfort and speed. It was as if the shoes had a magical power that propelled me forward, allowing me to run faster and longer than ever before.I also witnessed athletes wearing these top-level running shoes on the sports field, achieving remarkable results. Their swift movements and confident strides left a deep impression on me. It made me realize that these shoes are not only about physical performance but also a symbol of determination and pursuit of excellence.The experience of reading about and encountering these top-level running shoes has made me understand that in the pursuit of our goals, even the smallest details can make a huge difference. Just like these shoes, with their precise engineering and innovative features, they help us reach our potential and go beyond our limits.In conclusion, the exploration of top-level running shoes has not only broadened my knowledge but also inspired me to keep striving for the best in everything I do.2After reading about top-level running shoes, I was truly amazed by the seamless integration of technology and sports. The advancements in running shoe technology have completely revolutionized the way athletes perform and experience their runs.One remarkable example is the carbon fiber plate incorporated in some running shoes. This innovation defies traditional designs and provides an enhanced energy return, allowing runners to take longer and more efficient strides. It's like giving them an extra boost with each step, making it possible to break through personal records and reach new heights of performance.The stories of renowned athletes achieving better results thanks to these top-notch running shoes are truly inspiring. Take, for instance, athlete X who struggled to improve their speed until they discovered a particular brand of top-level running shoes. With the support and technology these shoes offered, they managed to shave off precious seconds from their previous best times and secure a podium finish.The fusion of technology and sports in the realm of running shoes is not just about performance enhancement; it's a testament to humaningenuity and the pursuit of excellence. It shows that with the right tools and innovations, we can constantly push the boundaries of what is possible and redefine the limits of our capabilities. These running shoes are not merely footwear; they are a symbol of progress and the relentless spirit of improvement in the world of sports.3After reading about top-notch running shoes, my perspective on sports has undergone a remarkable transformation. Previously, I had underestimated the significance of a good pair of running shoes, considering them merely as an accessory rather than a crucial element for an effective workout. However, the information I garnered from the reading material completely changed my mindset.I came across numerous instances where athletes attributed their enhanced performance and reduced risk of injuries to the quality of their running shoes. This made me realize that the right pair of shoes could provide the necessary support, cushioning, and stability, enabling me to run with greater ease and efficiency.For instance, I used to struggle with joint pain during long runs, but after learning about the features of top running shoes and investing in a pair, I noticed a significant improvement. The pain gradually subsided, and I could cover longer distances without feeling exhausted.Moreover, the knowledge about these shoes has sparked a newfoundpassion for sports within me. I am now more motivated to engage in regular running activities, knowing that having the right equipment can enhance my experience and results. The world of top running shoes has opened up a whole new dimension of possibilities for my fitness journey.4After reading about top-level running shoes, I was deeply intrigued by the complex relationship between sports equipment and performance.In various scenarios, top-level running shoes demonstrate distinct advantages. For instance, during long-distance races, their excellent shock absorption and stability can significantly reduce the impact on joints, allowing runners to maintain a consistent pace without feeling overly fatigued. However, in wet or slippery conditions, some top-level running shoes may have limitations in terms of grip, increasing the risk of slips and falls.When comparing different brands of top-level running shoes, we can find notable differences. Some brands focus on lightweight designs to enhance speed, while others prioritize durability and comfort. Take Brand A and Brand B for example. Brand A's shoes are known for their cutting-edge materials that offer superior breathability and flexibility, making them ideal for runners seeking a lightweight and responsive feel. On the other hand, Brand B emphasizes the use of high-quality cushioning systems to provide maximum support and protection, suitable for those with a historyof foot or joint problems.In conclusion, top-level running shoes undoubtedly play a crucial role in enhancing our performance, but their effectiveness depends on a variety of factors. It's essential to choose the right pair based on individual needs and the specific conditions of the activity. Only then can we truly unlock the potential of these advanced sports equipment and achieve better results in our running endeavors.5After reading about top-level running shoes, I was deeply moved and enlightened. These shoes are not just a simple pair of footwear but a symbol of the pursuit of excellence in the world of sports.The design concept behind top-level running shoes showcases the unwavering dedication and pursuit of innovation by manufacturers. They take into account various factors such as biomechanics, material science, and aerodynamics to provide runners with the ultimate support and performance. This attention to detail reflects the spirit of never settling for mediocrity and constantly striving for improvement in the realm of sports.For instance, the lightweight and breathable materials used in these shoes enable runners to move freely and comfortably, reducing the burden on their feet and enhancing their performance. The advanced cushioning technology helps absorb shock and reduce the risk of injury, allowing athletes to push their limits without fear.Moreover, top-level running shoes play a crucial role in promoting the development of sports culture. They inspire more people to take up running and embrace an active and healthy lifestyle. When people see professional athletes achieving outstanding results wearing these shoes, it ignites their passion and determination to pursue their own fitness goals.In conclusion, top-level running shoes are not only a technological marvel but also a source of inspiration and motivation. They remind us that in the pursuit of sports and a healthy life, we should always aim for the best and persevere in the face of challenges.。
智慧系统英文缩写建设方案
智慧系统英文缩写建 设方案
汇报人：XX
2024-01-28
REPORTING
• Overview and Background of Smart 目 录
Systems • English abbreviation strategy
development • Technical architecture design and
Promotion strategy planning
• Develop a promotional plan: Develop a detailed promotional plan for the target audience, including promotional channels, timeline, promotional content, etc.
After the project is completed, it will form an efficient, intelligent, and adaptive smart system that can meet the intelligent needs of customers in various fields. At the same time, the implementation of the project will drive the development of related industries and promote sustainable economic and social development.
Evaluation and testing
Evaluate and test the remaining candidate abbreviations, including semantic accuracy, memory difficulty, and fit with the target audience.
基于 ANSYS的太阳能天窗的优化设计
基于 ANSYS的太阳能天窗的优化设计作者：文 / 王小美李健来源：《时代汽车》 2020年第15期王小美李健南通理工学院江苏省南通市 226002摘要：将汽车天窗设计成太阳能天窗，不仅可以为车载蓄电池充电，而且为汽车轻量化设计提供一个新的方向。
本文分析了汽车太阳能天窗的结构，使用ANSYS软件对太阳能天窗的横梁，进行了静态强度分析与校核，并拟定了改进方案。
对主要设计参数进行了优化与改进，最终实现横梁部件的结构优化和轻量化。
关键词：太阳能天窗强度校核 ANSYS 结构优化Optimal Design of Solar Sunroof Based on ANSYSWang Xiaomei，Li JianAbstract：Changing the car sunroof into a solar sunroof can not only charge the car battery, but also provide a new direction for the lightweight design of the car. This paper analyzes the structure of the automobile solar sunroof, uses ANSYS software to analyze and check the static strength of the beam of the solar sunroof, and draws up an improvement plan. The main design parameters have been optimizedand improved, and finally the structural optimization and lightweight of the beam components are realized.Key words：solar sunroof, strength check, ANSYS, structural optimization1 引言随着人们环保意识的不断增强和新能源在各行各业里的逐步应用[1]。
我们的航天事业作文
China's Aerospace Industry: Steady Steps Toward the Vastness of the Starry Sea中国的航天事业自诞生之日起，便承载着国家富强、民族振兴的梦想。
几十年来，一代代航天人筚路蓝缕，以自强不息的精神，推动中国航天事业不断取得新突破，为国家的科技进步和现代化建设做出了巨大贡献。
Since its inception, China's aerospace industry has carried the dreams of national prosperity and ethnic rejuvenation. Over the decades, generations of aerospace professionals have persevered in their efforts, displaying a spirit of self-improvement, and continuously making new breakthroughs in China's aerospace industry. They have made tremendous contributions to the country's technological progress and modernization construction.一、航天技术的快速发展1. Rapid Development of Aerospace Technology中国航天技术的快速发展，体现在载人航天、深空探测、卫星通信等多个领域。
从神舟飞船的载人飞行，到嫦娥探月工程的顺利实施，再到北斗卫星导航系统的全球组网，每一项成就都彰显了中国航天实力的显著提升。
这些成就不仅展示了中国航天技术的成熟与先进，也为中国在国际航天领域树立了良好形象。
小度突击步枪的作文英语
小度突击步枪的作文英语Title: The Xiaodu Assault Rifle: A Revolutionary Weapon System。
The Xiaodu Assault Rifle stands as a testament to innovation and efficiency in modern weaponry. Developed bya team of dedicated engineers and designers, it representsa paradigm shift in firearms technology. In this essay, we will delve into the intricacies of the Xiaodu Assault Rifle, exploring its design, capabilities, and impact on contemporary warfare.At its core, the Xiaodu Assault Rifle embodies the principles of versatility and adaptability. Its modular design allows for seamless customization, catering to the diverse needs of soldiers in various combat scenarios. Whether engaging in close quarters combat or providing suppressive fire from a distance, the Xiaodu excels in both accuracy and reliability.One of the defining features of the Xiaodu AssaultRifle is its advanced sighting system. Equipped with state-of-the-art optics, including a holographic sight and infrared laser, it enables precision targeting even in low-light conditions. This enhanced targeting capability significantly enhances the effectiveness of soldiers on the battlefield, allowing for quick and accurate engagements with enemy forces.Furthermore, the Xiaodu Assault Rifle boasts impressive firepower, thanks to its high-capacity magazine and selective fire modes. Whether utilizing single-shot, burst fire, or fully automatic modes, soldiers have theflexibility to adapt to changing tactical situations rapidly. This versatility ensures that the Xiaodu remains a formidable weapon in the hands of trained professionals.In addition to its combat prowess, the Xiaodu Assault Rifle incorporates several ergonomic features designed to enhance user comfort and control. From adjustable stock to ambidextrous controls, every aspect of its design has been meticulously engineered to optimize performance in thefield. This focus on ergonomics not only improves accuracy but also reduces fatigue during prolonged engagements.Moreover, the Xiaodu Assault Rifle incorporatescutting-edge materials and manufacturing techniques, resulting in a lightweight yet durable weapon system. Its composite construction ensures resilience to harsh environmental conditions while minimizing operator fatigue during extended missions. This combination of durability and lightweight design makes the Xiaodu an ideal choice for modern warfare operations.Beyond its technical specifications, the Xiaodu Assault Rifle represents a significant leap forward in the evolution of small arms technology. Its development underscores the ongoing quest for innovation and improvement within the defense industry, driving advancements that enhance the capabilities of military forces worldwide. As a result, the Xiaodu serves as a symbol of progress and ingenuity in the pursuit of national security.In conclusion, the Xiaodu Assault Rifle stands as a testament to the relentless pursuit of excellence in firearms design. With its modular construction, advanced sighting system, and ergonomic features, it represents a paradigm shift in modern weaponry. As military forces continue to evolve and adapt to emerging threats, the Xiaodu remains at the forefront of innovation, ensuring that soldiers are equipped with the tools they need to succeed on the battlefield.。
前横向稳定杆轻量化与性能验证
10.16638/ki.1671-7988.2021.04.028前横向稳定杆轻量化与性能验证梁飞飞（宝能汽车集团有限公司动态性能部，广东深圳518000）摘要：为保证稳定杆实现轻量化，通过降低稳定杆直径更改纵向长度来实现降重，通过Adams KC、CATIA DMU、HyperMesh、Adams操稳平顺仿真及VBOX操稳测试来验证，保证各项性能情况下实现稳定杆轻量化设计。
结果表明，稳定杆轻量化后重量降低31%，研究方法可为整车轻量化平顺性提升提供依据。
关键词：稳定杆；轻量化；动力学；操稳测试中图分类号：U467 文献标识码：B 文章编号：1671-7988(2021)04-91-04Lightweight and Performance Verification of Front Antiroll BarLiang Feifei( Dynamic Performance Department, Baoneng Automobile Group Co., Ltd., Guangdong Shenzhen 518000 )Abstract: In order to realize the lightweight of antiroll bar, the weight reduction is realized by reducing the diameter of antiroll bar and changing the longitudinal length. Through Adams KC, CATIA DMU, HyperMesh, Adams handling and riding simulation and VBox handling test verification, the lightweight design of antiroll bar is realized under the condition of ensuring various performances. The results show that the weight of antiroll bar is reduced by 31%, The research method can provide the basis for the improvement of vehicle lightweight and ride comfort.Keywords: Antiroll bar; Lightweight; Dynamics; Handling testCLC NO.: U467 Document Code: B Article ID: 1671-7988(2021)04-91-04前言汽车稳定杆在保证侧倾角刚度不变的情况下，疲劳性能满足的情况下，降低重量可降低簧下冲击提升平顺性。
拖把可以怎样改进作文英语
拖把可以怎样改进作文英语Title: Enhancing the Mop: Innovations and Improvements。
Introduction。
The humble mop, an essential tool in maintaining cleanliness, has undergone various transformations over the years. Yet, there's always room for improvement. In this essay, we will explore potential enhancements for the traditional mop, considering efficiency, effectiveness, and environmental impact.Material Selection。
One area of improvement lies in material selection. Traditional mops often use cotton or synthetic fibers,which have limitations in terms of durability and absorbency. Exploring advanced materials like microfiber could revolutionize the performance of mops. Microfiber offers superior absorbency, trapping dirt and grime moreeffectively, while also being more durable and eco-friendly.Ergonomic Design。
Another aspect to consider is the design of the mop itself. Traditional mops can be cumbersome to use, leadingto fatigue and discomfort, especially during prolonged cleaning sessions. Introducing ergonomic designs that prioritize user comfort and efficiency could significantly enhance the user experience. Features such as adjustable handles, lightweight materials, and swivel heads could make mopping less strenuous and more enjoyable.Innovative Cleaning Mechanisms。
向朋友推荐最近买的一件有用的物品英文作文
向朋友推荐最近买的一件有用的物品英文作文全文共3篇示例，供读者参考篇1Title: Recommend a Useful Item I Recently Purchased to a FriendDear Friend,I hope this letter finds you well. I am writing to share with you about a great item I recently purchased that has proven to be incredibly useful and beneficial in my daily life. I believe it would also be of great value to you, and I highly recommend you consider purchasing one for yourself.The item I am referring to is the Smart Fitness Tracker by Fitbit. As someone who is committed to living a healthy and active lifestyle, I have found this fitness tracker to be an essential tool for tracking my daily physical activity, monitoring my heart rate, and keeping tabs on my sleep quality. Its sleek design and user-friendly interface make it easy to use and integrate seamlessly into my daily routine.One of the features I appreciate most about the Fitbit tracker is its ability to set and track personalized fitness goals. By settingspecific goals for steps taken, calories burned, and active minutes, I am able to stay motivated and accountable for my daily exercise routine. The tracker also provides valuable insights and feedback on my progress, helping me make informed decisions about my health and fitness goals.In addition to its fitness tracking capabilities, the Fitbit tracker also offers other useful functions such as notifications for calls, messages, and calendar events, as well as a silent alarm to wake you up gently in the morning. Its long battery life and water-resistant design make it suitable for wearing all day, whether you are working out at the gym or going for a swim.Overall, I am thrilled with my purchase of the Fitbit Smart Fitness Tracker and believe it would be a beneficial addition to your daily routine as well. I have already seen an improvement in my health and fitness habits since using this device, and I am confident you will experience similar benefits.I encourage you to consider investing in a Fitbit tracker for yourself and start enjoying the many benefits it has to offer. I am more than happy to answer any questions you may have or provide additional information about my experience with this item.Here's to our continued health and fitness journey together!Warm regards,[Your Name]篇2Title: A Useful Product Recommendation to FriendsIn today's fast-paced world, finding products that make life easier and more convenient is always a plus. Recently, I came across a product that has truly made a difference in my daily routine, and I couldn't wait to share it with my friends.The product I am excited to recommend is the portable blender. As a busy professional who is always on the go, I often struggle to find the time to prepare nutritious meals and snacks. However, since purchasing this portable blender, my life has become so much easier.First and foremost, the portable blender is incredibly convenient. Its compact size makes it easy to take with me wherever I go. Whether I'm heading to work, the gym, or out for the day, I can simply throw the blender in my bag and have a healthy smoothie or shake ready to go.Secondly, the blender is extremely versatile. I can use it to make a variety of different beverages, from protein shakes tofruit smoothies to vegetable juices. The possibilities are endless, and I love being able to customize my drinks to suit my mood and dietary needs.Moreover, the blender is easy to use and clean. With just a push of a button, I can blend up my ingredients quickly and efficiently. And when I'm done, the detachable parts make cleanup a breeze.Overall, I highly recommend the portable blender to all my friends. It has truly revolutionized the way I eat and drink on a daily basis, and I know it will do the same for them. So if you're looking for a product that is convenient, versatile, and easy to use, look no further than the portable blender. Trust me, you won't be disappointed.篇3Recently, I purchased a very useful item that I would like to recommend to my friends. It is a portable charger that has proven to be extremely handy in my day-to-day life.First of all, let me introduce the charger. It is a compact and lightweight device that can easily fit into my pocket or bag. It has a large battery capacity, allowing me to charge my phone multiple times before needing to be recharged itself. The chargeralso has multiple output ports, so I can charge multiple devices at the same time, which is extremely convenient.I have found this portable charger to be particularly useful ina variety of situations. For example, when I am traveling, I no longer have to worry about my phone running out of battery while I am on the go. I can simply plug my phone into the charger and continue using it without any interruptions. Additionally, I have used the charger during long days at work or school when I need to stay connected but don't have access to a power outlet.I highly recommend this portable charger to my friends because it has made my life so much easier. It is a reliable and convenient solution for anyone who is always on the move and needs to keep their devices charged. I have been very impressed with the quality and performance of this charger, and I know that my friends will be too.In conclusion, if you are in need of a reliable and efficient way to keep your devices charged on the go, I highly suggest investing in a portable charger. It has been a game-changer for me, and I know that it will be for my friends as well. Give it a try and see for yourself how much easier it can make your life!。
一把未来的吉他作文英语
一把未来的吉他作文英语The Future Guitar。
In the year 2050, a new kind of guitar was invented. It was called the Future Guitar. It was not just any ordinary guitar, but a guitar that could change the way we play music forever.The Future Guitar was made of a special material that was both lightweight and durable. It had a sleek and modern design, with a touch screen display on the body of the guitar. The touch screen display allowed the user tocontrol various settings and effects, making it possible to create a wide range of sounds and styles.One of the most exciting features of the Future Guitar was its ability to connect wirelessly to other instruments and devices. This meant that musicians could collaborate and create music together, no matter where they were in the world. It also meant that the Future Guitar could be usedfor live performances, with the sound and effects being controlled by a sound engineer offstage.Another innovative feature of the Future Guitar was its ability to learn and adapt to the user's playing style. The touch screen display had a built-in artificial intelligence system that analyzed the user's playing and made suggestions for improvement. This meant that even beginners could quickly learn how to play the guitar like a pro.The Future Guitar also had a built-in recording system, allowing musicians to easily record and share their music with others. The recordings could be saved to the guitar's internal memory or uploaded to the cloud for easy access.Overall, the Future Guitar was a game-changer in the world of music. Its advanced features and capabilities made it possible for musicians to create and share music in ways that were previously unimaginable. It was truly a guitarfor the future.。
汉服设计大赛英文作文
汉服设计大赛英文作文英文：As a participant in the Hanfu Design Contest, I am excited to share my thoughts on the topic. Hanfu, as a traditional Chinese clothing, has been gaining popularityin recent years. However, there is still a lot of room for improvement in its design and promotion. In my opinion, a successful Hanfu design should not only reflect the essence of traditional Chinese culture but also cater to modern people's taste and lifestyle.Firstly, the design should be based on historical research and cultural significance. Hanfu is not just a piece of clothing but also a symbol of Chinese culture. Therefore, the design should be authentic and respectful to the traditional style. For example, using traditional patterns and colors, such as dragons and phoenixes, can add a cultural touch to the design.Secondly, the design should also meet modern people's needs and preferences. In today's society, people value comfort and convenience more than ever. Therefore, a successful Hanfu design should not only look beautiful but also be comfortable to wear and easy to maintain. For example, using breathable and lightweight fabrics can make the Hanfu more comfortable to wear, and adding pockets can make it more functional.Lastly, promotion is also crucial for the success of Hanfu. As a traditional clothing, Hanfu may not be as widely accepted as Western clothing. Therefore, promoting Hanfu through various channels, such as social media and fashion shows, can help raise its popularity and influence. Additionally, collaborations with fashion designers and celebrities can also attract more attention and bring Hanfu to a wider audience.In conclusion, a successful Hanfu design should combine traditional culture and modern lifestyle, be comfortable and functional, and be promoted through various channels. I believe that with more efforts and innovations, Hanfu canbecome a beloved clothing style not only in China but also around the world.中文：作为汉服设计大赛的参赛者，我很高兴能够分享我的想法。
打羽毛球的英语作文
打羽毛球的英语作文Badminton is a sport that has captured the hearts of many, not just for its competitive edge but also for the sheer joy and health benefits it brings. It is a game that combines speed, agility, and strategy, making it an excellent choice for those looking to stay active and engaged.Growing up, I was introduced to badminton at a young age by my father, who was an avid player himself. The first time I held a racket, I felt a sense of excitement and curiosity. The lightweight shuttlecock, with its distinctive feathered design, seemed to invite a game of finesse and precision.As I began to learn the basics, from serving to smashing, I was immediately drawn to the game's fast pace. The back-and-forth motion of the shuttlecock across the net demanded quick reflexes and a keen eye. Each rally was a dance of sorts, with players moving gracefully across the court, their rackets slicing through the air with purpose.One of the most rewarding aspects of playing badminton is the social interaction it fosters. Whether it's a casual game with friends or a competitive match, badminton brings people together. The camaraderie among players is palpable, with laughter and friendly banter often punctuating the rallies.Moreover, badminton is a sport that can be enjoyed by individuals of all ages and skill levels. It's not just aboutwinning; it's about the experience of playing, the thrill of the game, and the satisfaction of improvement. The sport has taught me valuable lessons in sportsmanship and perseverance.Playing badminton has also had a positive impact on my physical health. It's an excellent cardiovascular workoutthat can burn a significant number of calories, making it a popular choice for those looking to stay fit. Additionally, the constant movement and footwork improve balance and coordination.In conclusion, badminton is more than just a sport; it's a way of life for many. It's a game that can be played for leisure or taken up competitively, offering a unique blend of physical exertion and mental engagement. Whether you're new to the game or a seasoned player, badminton offers something for everyone, making it a sport that truly stands out in the world of athletics.。
电主轴专业术语英语
电主轴专业术语英语Electric spindle, also known as Motor spindle, is a professional term in the field of numerical control machine tools, referring to a new technology that integrates the spindle of the machine tool with the spindle motor. This transmission structure combines the spindle motor and the machine tool spindle into one, enabling the spindle components to be relatively independent from the transmission system and overall structure of the machine tool. Therefore, it can be made into a "spindle unit", commonly known as "Electric spindle" or "Motor spindle".The main characteristics of Electric spindle include high speed, high precision, low noise, and an inner ring with a locking port that is more suitable for spray lubrication. This technology has become the best choice for spindle units in high-speed micro-cutting systems, as it can reduce noise and vibration, improve dynamic balance, and meet requirements for lightweight, small inertia, and compact structure.In the field of numerical control machine tools,Electric spindle is widely used in high-speed cutting, grinding, drilling, and other machining processes. Its high speed and high precision characteristics make it possibleto achieve efficient and accurate machining of various materials, including metals, plastics, composites, and more. In addition, the low noise and low vibrationcharacteristics of Electric spindle also contribute to improving the working environment and reducing operator fatigue.The structure of Electric spindle typically includes a spindle body, a motor, a bearing system, a cooling system, and other components. The spindle body is the main component that supports the rotation of the workpiece or tool, and is usually made of high-precision materials such as ceramics or high-speed steel. The motor is the driving force of the spindle, and its performance directly affects the speed and torque of the spindle. The bearing system ensures the stability and accuracy of the spindle rotation, and the cooling system keeps the spindle running at aconstant temperature to prevent thermal deformation.In the design and selection of Electric spindle, it is necessary to consider various factors such as machining requirements, machine tool specifications, and working conditions. For example, the speed and torque of thespindle need to match the material and thickness of the workpiece, the cooling system needs to be able toeffectively dissipate heat generated during high-speed rotation, and the bearing system needs to have sufficient stiffness and damping to reduce vibration and improve machining accuracy.In addition to the basic structure and design considerations of Electric spindle, there are also some advanced technologies and trends in this field. For example, the development of high-power density motors and high-precision bearings has enabled the further improvement of spindle speed and accuracy. At the same time, theapplication of new materials and manufacturing processeshas also helped to reduce the weight and inertia of the spindle, improve its dynamic balance and stability.In summary, Electric spindle is an important component of high-speed and high-precision machining systems, and its performance and quality directly affect the efficiency and accuracy of machining. With the continuous development of technology and the improvement of manufacturing processes, Electric spindle will continue to evolve and improve, meeting the increasing demands of modern manufacturing industry for higher speed, higher precision, and more efficient machining.。
湖北省2021届高三十一校第二次联考英语试题(Word考试版)
鄂南高中黄冈中学黄石二中荆州中学龙泉中学武汉二中孝感高中襄阳四中襄阳五中宜昌一中夷陵中学2021 届高三湖北十一校第二次联考英语试题本试卷共10 页，共72 题。
全卷满分150 分。
考试用时120 分钟。
注意事项：1. 答卷前，考生务必将自己的姓名、准考证号填写在答题卡上。
2. 回答选择题时，选出每小题答案后，用铅笔把答题卡上对应题目的答案标号涂黑。
如需改动，用橡皮擦干净后，再选涂其他答案标号。
回答非选择题时，将答案写在答题卡上，写在本试卷上无效。
3. 考试结束后，将本试卷和答题卡一并交回。
第一部分听力（共两节，满分30 分）做题时，先将答案标在试卷上。
录音内容结束后，你将有两分钟的时间将试卷上的答案转涂到答题卡上。
第一节（共5 小题；每小题1.5 分，满7.5 分）听下面5 段对话。
每段对话后有一个小题，从题中所给的A、B、C 三个选项中选出最佳选项。
听完每段对话后，你都有10 秒钟的时间来回答有关小题和阅读下一小题。
每段对话仅读一遍。
1. What does the man think of the woman’s old a partment?A. Convenient.B. Comfortable.C. Noisy.2. Where did the woman leave her mobile phone?A. In her bag.B. On the table.C. On the chair.3. How did James contact the woman yesterday?A. By postcard.B. By email.C. By phone.4. What are the speakers probably talking about?A. A pet.B. A job.C. An appointment.5. Who is the man most probably going to work with?A. Pre-school kids.B. The disabled.C. Teenagers.第二节（共15 小题；每小题1.5 分，满22.5 分）听下面5 段对话或独白。
我心爱的装备英语作文
我心爱的装备英语作文My Beloved Gear - English EssayIn the world of sports and hobbies, gear serves as an essential tool that enhances our performance and enjoyment. Among the various gear I possess, there is one particular item that holds a special place in my heart - my beloved equipment. Specially designed for my favorite sport, this gear has accompanied me on numerous adventures, allowing me to excel and express my passion for the sport. In this essay, I will describe this treasured possession, its significance to me, and the impact it has had on my athletic pursuits.My beloved gear is a high-quality, state-of-the-art tennis racket. As a passionate tennis player, this piece of equipment has become an extension of my arm, enabling me to play the game with precision and finesse. It is constructed from a combination of graphite and carbon fiber, which resultsin a lightweight yet sturdy frame. The grip is wrapped with a premium synthetic material to ensure maximum comfort and control during intense rallies. The racket's strings, made of the finest polyester and nylon blend, provide optimal tension for power and accuracy. Overall, its sleek design and technological advancements make it a superior choice for any avid tennis player.The significance of this tennis racket in my life goes beyond its physical attributes. It represents my dedication to the sport and the countless hours I have devoted to improving my skills. Every time I hold the racket in my hands, I am reminded of the hard work and determination I have put intomastering the game. It serves as a symbol of perseverance and the continuous pursuit of excellence.One of the most evident impacts my beloved gear has had on my athletic pursuits is the improvement in my performance on the tennis court. The racket's lightweight design allows for swift and effortless swings, facilitating powerful shots and quick reactions. The advanced string technology ensures optimal ball control, resulting in more accurate and controlled shots. Additionally, the comfortable grip reduces fatigue and allows for extended periods of play without compromising performance. Overall, this gear has significantly enhanced my competitive edge and overall enjoyment of the sport.Moreover, my beloved gear has also played a vital role in building my confidence as a tennis player. Knowing that I have a reliable and high-performing racket in my hands gives me the assurance to take risks and attempt challenging shots. The trust I have in my equipment allows me to focus on the game without second-guessing my abilities. Consequently, my confidence has propelled me to push my limits and explore new techniques, leading to further improvement and growth as a player.Beyond its tangible benefits, my beloved gear holds sentimental value as it has been with me through numerous victories, defeats, and cherished memories. It has witnessed my triumphs on the court and has offered solace during moments of disappointment. Every scratch and scuff tells a story, representing the battles fought and the lessons learned. It serves as a constant reminder of my love for the sport and the joy it brings to my life.In conclusion, my beloved tennis racket is more than just a piece of sports equipment. It is a tangible representation of my passion for the game, a catalyst for improvement and confidence, and a cherished companion throughout my athletic journey. From its advanced technology to its sentimental value, this gear has undoubtedly enhanced my skills and enriched my experiences on the tennis court. With every swing, it becomes clear that my beloved gear is not merely an object, but a testament to my dedication and unwavering love for the sport.。
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The Lightweight Design and Improvement of Aluminum AlloyAutomobile WheelYing Shi 1, a , Liang Wang 2, b and Peng Yu 1, c1School of Transportation and Vehicle Engineering, Shandong University of Technology, Zibo P.R.China, 2550492Technology Department, Jinan Geely Automobile Research and Development Institute, Jinan P.R.China, 250109a shiyingsd@,b wang9813@,c yupeng521999@Key words: Auto wheel; Aluminum alloy; Light weight; ImprovementAbstract. This paper models the auto wheel by UG, and made analysis through ANSYS Workbench software. The result of finite element analysis shows that the maximum stress is much less than the allowable stress of aluminum alloy wheels. So auto wheels can be optimized further. Then structural optimization is made to minimize the weight of the wheel. The static analysis and fatigue analysis to the optimized wheel is made then. The results of equivalent stress, equivalent elastic strain and total deformation are similar with the results that before optimize, but its weight is decreased. It gains the goal of lighting weight, decreasing fuel consumption and reducing pollution.IntroductionWheels are fixed margin of the tire, the tire support and bear the vehicle load and tire rigid wheels. Wheels usually are connected by wheels, rims and spokes connecting the two components of the composition. Move through the rolling wheel bearings supporting the axle or journal on the knuckles. It is also known as wheel rims, used to install tires. Radial spokes are two kinds of plate-and-spoke type.Wheel of a car is one of the important safety components. It can not only suffer the vertical force under the wheels, but also suffer the irregular forces resulting from cars starting, braking and turning the process of moving, and road shock. As a high-speed rotation of the wheel, its quality will have a major impact to the vehicle stability, handling and other properties. The development direction of the wheel is to reduce the quality and beautify its appearance as far as possible when it can ensure sufficient strength and reliability.Practice has proved that the process of moving the wheel in the actual bending fatigue failure may account for the largest proportion. Therefore, this study is to make a finite element model of the wheel to find the local high stress area based on dynamic cornering fatigue test wheel load and constraint boundary conditions quickly, in order to improve the local geometry and reduce the stress concentration in these regions and find examples to improve the fatigue life of wheel.1. Geometric model of automobile wheelTaking into account the graphics wheel complex, multi-surface curve, and chamfer features such as the same small chamfer, which limited import ANSYS Workbench in analysis and optimization of the grid may not be caused by, or the finite element model of cell division and node too much, resulting in the calculation process takes too much computer resources and can not continue operations. And the characteristics of these small wheels in the spent alloy wheels after the structural analysis and optimization of the impact of stress and strain can be ignored. Therefore some small chamfers are omitted in the modeling process.Based on two-dimensional CAD drawing we can create the wheel in the geometric model of UG.2. Automobile wheel finite element static analysis2.1 Importing geometryThe software will be created in the UG wheel solid model into ANSYS Workbench based on CAD drawing of the wheel.2.2 The definition of materialMaterials used in this paper for the aluminum alloy (Aluminum Alloy), ANSYS Workbench software offers a number of commonly used material parameters, so some parameters can be time consuming accessing large amounts of data, getting Young's modulus, Poisson's ratio and density and other parameters.2.3 MeshThe way of hexahedral (Hex Dominant) units grid points, the grid size is 8mm, the model after the division grid. It was totally divided into 83,313 nodes, 25,412 units.2.4 The definition of load and constraintAs mentioned earlier, the actual process of moving the wheels bending fatigue failure mayaccount for the largest proportion of this research is based on dynamic cornering fatigue test wheel load and constraint boundary conditions. .According to the PRC automotive industry standard QC / T 221-1997 [2]. Constraints and loads the wheel in this article: the edge of the wheel rim on both sides of the fixed constraints imposed, and put the wheels of the four bolt holes moment. Taking into account the structural characteristics of the wheel, put an interval of 36 ° bending moment (Moment values are the same, only the direction of change).2.5 Solution and post processingAfter a solution and post processing, different equivalent stress diagram and equivalent elastic strain under different directions of moment can be gotten.3. The fatigue analysis in finite element of automobile wheelFatigue analysis is after linear static analysis, carried out through design simulation automatically. Based on the static analysis, the specific steps include identifying SN curve, setting the parameters and solving the results.3.1 Determine the S-N curveThe S-N curve of material is the curve showing the relationship between Standards that applied stress level and fatigue life, referred to as S-N curves. The material used in this paper is aluminum; ANSYS Workbench comes with aluminum alloy in the SN curve.3.2 Set solution parametersIn the fatigue calculations, the definition of load types, as the wheel load can be approximated as symmetric suffered circulation, loading type (Type) select "Fully Reversed"..4. Optimized and improved automobile wheelThe finite element analysis results show that spoke and wheel mounting flange at the junction is of relatively weak, while the wheel rim and the wheel mounting flange part is of great lightweight potential. So this paper optimizes and improves the thickness of aluminum alloy car wheel mounting flange, make the wheel weight lightened.After thinning the wheel mounting flange by 10mm, we can get the model which has been optimized, as shown Fig.1.4.1 Static analysis of the improved wheelThe optimized model is imported into ANSYS Workbench in the optimized static analysis of aluminum alloy wheels, the steps is the same as static analysis before optimized. Optimized model for static analysis and elastic strain and stress diagram wheel diagram is shown in Fig.2 and Fig. 3respectively.Figure 1The optimized geometry wheelsa) wheel lateral b) inside the wheelFigure 2 Equivalent Stressa) wheel lateral b) inside the wheelFigure 3 Equivalent Elastic Strain Table 1 The compared results of analysis before and after optimization of aluminum alloy wheelMaterial Aluminum (before optimization)Aluminum (optimized)Σmax considerable stress maximum stress [MPa]131.5 118.75Stress concentration area Spoke and wheel mounting flange at the junction spoke and wheel mountingflange at the junctionMinimum fatigue life 2.3259e5 1.0134e5Stress concentration areaspoke and wheel mounting flange at the junction spoke and wheel mountingflange at the junctionMaximum deformation [mm] 0.13628 0.1387Wheel Weight [Kg] 8.0312 7.6684Weight lightened 4.52%5. ConclusionThe compared results of static analysis before and after optimization of aluminum alloy wheels are shown in Table I. By comparing the results the following conclusions can be drawn.Considering from the stress and elastic strain, the optimized aluminum alloy car wheels’ maximum stress, maximum strain are smaller than it before optimization and the decrease of stress concentration is somewhat alleviated.Compared with the previous optimization, the optimized aluminum alloy car wheels’ weight on the relative ease is lightened by 4.52% than it before optimization, thus we can achieve lightweight of the wheel under the precondition to strength.Available from Table I, the minimum life is 2.3259e5, longer than the fatigue life 1.0134e5, showing that under the default number of cycles, the various parts of the wheel are more secure than before, thus we can achieve lightweight of the wheel under the precondition to achieve fatigue life. References[1] Weixin Liu. Automotive design. Tsinghua University Press .2001:526 ~ 532.[2] Shan Ren, Qiwen Zhu, Tianqiang Du. Automobile wheel performance test methods andAdvanced Research on Mechanical Engineering, Industry and Manufacturing Engineeringdoi:10.4028//AMM.63-64The Lightweight Design and Improvement of Aluminum Alloy Automobile Wheeldoi:10.4028//AMM.63-64.189。