大学生方程式赛车设计(总体设计)

毕业设计（论文）

题目大学生方程式赛车设计（总体设计）

2013年 5 月30日

大学生方程式赛车设计（总体设计）

摘要

本次毕业设计为期两个多月，进行了方程式赛车的总体设计。在设计中，主要运用了对比分析的方法，各项参数通过优化设计和UG、MATLAB等进行优化。

初期阶段，我们根据2012年大学生方程式汽车大赛规则确定了赛车整体布置方案，并进行论证与分析，初步确定赛车主要参数。通过计算与对比，确定发动机型号，初选传动系最大传动比、最小传动比。

中期阶段，我们设计中使用UG7.0三维软件对各个零部件总成进行建模和整体装配，并进行悬架、转向的运动干涉分析。利用发动机动力特性曲线特点，用MATLAB软件绘制出赛车驱动力-行驶阻力平衡图、加速度曲线图等，并详细计算赛车燃油经济性。

最后阶段，利用UG7.5进行导出赛车总体布置二维工程图，并制成总体参数表，并将第三代赛车与第二代赛车进行对比分析。对于考虑到的实际生产中可能发生变化的悬架、车架和转向部件，预留方案。

通过本次毕业设计，了解和掌握了对汽车进行总体设计的步骤和方法，巩固了本专业的所学的专业知识，增强了搜集资料、整合资料的能力，这些将为我毕业以后从事汽车设计工作打下良好的基础。

关键词：FSAE，总体参数，参数确定，总布置,赛车动力性,燃油经济性

FORMULE SAE (OVERALL DESIGN)

ABSTRACT

For two months, My graduation design is the overall design of the formula racing. we used the contrast analysis method mainly in the design, through optimizing the parameters optimization design and optimization of UG MATLAB, etc.

Initial stage, we according to 2012 auto contest rules determine college equation overall layout of the car, and the demonstration and analysis, the main parameter is determined primarily racing. Through calculation and comparison, sure engine type, primaries drivetrain maximum transmission ratio, minimum transmission.

The intermediate stage, we design UG7.0 3d software used in various parts of assembly for modeling and whole assembly, and suspension, steering movement interference analysis. Use of engine power characteristic curve characteristic, MATLAB software mapped drive car driving forces - resistance balance figure, acceleration curve, and etc, and detailed calculation racing fuel economy.

The final stages UG7.5 are derived by car, general layout, and two-dimensional engineering graphics overall parameter table, and made the third generation and the second generation racing cars are compared and analyzed. For considering the actual production of may change suspension, frame and steering parts, obligate scheme.

Through the graduation design, I understand and master the overall design of car of the steps and method, the professional knowledge of professional knowledge, enhance the data collection and integration of information, these ability after my graduation will be engaged in car design lay a good foundation for the job.

KEY WORDS:FSAE, general parameters, parameter identification, general arrangement,the car power, fuel economy

特殊符号

m a 汽车总质量kg

V 最高车速h

kg

L 轴距mm

B1 前轮距mm

B2 后轮距mm

R 最小转弯半径mm

hg 满载时质心高度mm

hgˊ 空载时质心高度mm

D 轮胎直径mm

B 轮胎宽度mm

P 轮胎气压MP

A 汽车迎风面积

F 滚动阻力系数

C空气阻力系数

D

o i驱动桥主减速比

g i变速器传动比

F汽车行驶使的空气阻力

w

1g i变速器Ⅰ挡传动比

F车轮与路面的附着力

ϕ

m汽车总质量

a

u汽车行驶速度

a

P发动机最大功率

max

e

T发动机转矩

e

P为克服滚动阻力所消耗的功率

f

ϕ轮胎与路面的附着系数