船舶航海性能

e.g.(P47-4-2)
bulbous bow 球鼻首 rated horsepower 额定马力 effective horsepower 有效马力 To achieve this, a bulbous bow is widely used in many types of ships and the rated horsepower of main engines is generally to be over two times is big as the effective horsepower of ships.
Lesson 5 Seakeeping Performances
Contents ：1. Vocabulary and Sentence
2. Vocabulary summary 3. Exercise
一、Vocabulary and Sentence
e.g.(P46-1-1) floatability 浮性 One of the important seakeeping 正的、积极的 performances is floatability that indicates the ability of vessel floating positively on water under the condition of a certain amount of deadweight. 船舶航海性能中一个重要的性能是浮性， 浮性是指船舶在载重量一定的情况下浮在 水面上的能力。
e.g.(P46-2-1) reserve buoyancy 储备浮力 load-line mark 载重线标记 When we deal with floatability, we must first be clear about the following two technical terms, i.e. reserve buoyancy and load-line mark. 技术用语、术语 处理浮性问题的时候，我们必须清楚两个 术语：储备浮力和载重线标记。
e.g.(P46-7-2) 倾斜试验 The gravity center of a ship to be calculated by means of an inclination test. The test is generally to be performed in calm water and with lovely weather. If you 静水 have got a drydock for the test, so much the better. 船舶重心通过倾斜试验计算的。试验通常在 静水和晴朗的天气下进行。如果能在干船坞 中进行试验是更好的。
e.g.(P46-3-2) 为了 buoyancy 浮力 保留 具体的 That is to say, to give you a concrete idea, any vessel is to retain some volume above water for the sake of extra buoyancy so that its draft allowed to increase without a sinking tragedy under particular but rare conditions, such as rough sea or serious 悲剧 破损 flooding due to hull damage. 也就是说，具体的描述为：船舶为获得额外的浮力 就要保留一些水上部分体积，从而吃水可以在不沉 船的（悲剧）情况下有所增加，例如当遇到汹涛海 浪或由于船体破损而严重进水这种不太常见的情况。
e.g.(P46-4-1) The Rules for Load Line 载重线公约 指示、表示 In respect of load-Line mark, it denotes a variety of the max. drafts of vessels in different seasons and at varied navigating zones. In China, CCS has worked out “The Rules for Load Line” 航区 关于载重线标记，它是指船舶在不同季节 和不同航区下船舶的最大吃水的变化情况。 在中国，CCS船级社已经制定出了“载重 线公约”。
证明、证据 悲惨的
so many a time by reason of poor stability. 当然，稳性对船舶建造来说非常重要，稳 性的不良经常导致生命的严重损失。历史 已经多次见证了由于稳性的不良而发生的 沉船悲剧。
e.g.(P46-6-1) 重要 metacenter 稳心 Vessel inclination may be divided into trim and heel. As the metacenter of transversal inclination is much more essential than that of longitudinal inclination, the emphasis is
e.g.(P47-4-1)
engine power 主机功率 There are two ways to raise ship speed, namely, to minimize water resistance and to increase main engine power. 提高船速可以有两种途径，即降低水阻力 和增加主机功率。
智慧、大脑
because it is far smaller than water resistance. Perhaps the only exception is high-speed boats. 船舶在航行过程中主要受水阻力的影响。 我们不要为空气的阻力而大伤脑筋，因为 它远远小于水的阻力，在这方面唯一的例 外也许就是高速艇 。
为了提高船速，我们在许多类型的船舶上广泛采 用球鼻艏；另外，一般来说，主机的额定马力比 船舶的有效马力要大两倍多。
e.g.(P47-1-1) fast speed 快速性 Another seakeeping performances the fast or rapidity which describes the ability for a ship to gain faster speed at lower consumption of power.
e.g.(P46-5-3) Stability is, of course, of great importance to shipbuilding since its failure will always lead to heavy loss of life. History has sadly witnessed tragic sinking of vessels
e.g.(P46-3-1) Then, what is the reserve buoyancy? As it is known to all, a ship has to obtain a certain amount of freeboard when she’s sailing at sea. 那么，什么是储备浮力呢？众所周知，船 舶在航行时要获得一定的干舷。
e.g.(P46-7-1) 措施 In order to obtain fine stability, precautions will normally be taken in two different ways. On one hand, gravity center is to be lowered; on the other hand, metacenter to be raised. 为了获得良好的稳性，通常采取两种不同 的方式。一方面降低重心。另一方面提高 稳心。
e.g.(P46-5-1) stability 稳性 One more seakeeping performance is the stability which is the ability that vessels will incline when affected by an exterior
e.g.(P47-3-1)
friction resistance 摩擦阻力 swirl resistance 漩涡阻力 wave-forming resistance 兴波阻力 遭受到 Water resistance to be encountered by a ship consists of friction resistance, swirl resistance and wave-forming( wavemaking) resistance. 船舶遭受到的水阻力由摩擦阻力、漩涡阻 力和兴波阻力组成 。
倾斜
最初的、原始的
外部的Leabharlann 恢复force, such as wind, wave, etc., and will restore its original position on the force removal. 撤销
另外一个重要的航海性能是指船舶稳性，稳性是 指船舶受到风、浪等外力时发生倾斜，当外力撤 销后能够回复到最初位置的能力。
e.g.(P46-3-5) For instance, the film, TITANIC, popular in every corner of the world and presenting a moving love story to the sentimental
观众 致命的 多愁善感的
消耗 功率
另外一个航海性能是快速性，描述的是船 舶在消耗较低功率时获得较高速度的能力。