船舶与海洋工程专业英语.pdf

1、Lesson OneThe Naval ArchitectA naval architect asked to design a ship may receive his instructions in a form ranging from such simple requirements as “ an oil tanker to carry 100 000 tons deadweight at 15 knots to a fully detailed speci precisely planned requirements. He is usually required to prepa

2、re a design for a vessel that must carry a certain weight of cargo (or number of passengers ) at a specified speed with particular reference to trade requirement; high-density cargoes, such as machinery, require little hold capacity, while the reverse is true for low-density cargoes, such as grain.D

3、eadweight is defined as weight of cargo plus fuel and consumable stores, and lightweight as the weight of the hull, including machinery and equipment. The designer must choose dimensions such that the displacement of the vessel is equal to the sum of the dead weight and the lightweight tonnages. The

4、 fineness of the hull must be appropriate to the speed. The draftwhich is governed by freeboard rulesenables the depth to bedetermined to a first approximation.After selecting tentative values of length, breadth, depth, draft, and displacement, the designer must achieve a weight balance. He must als

5、o select a moment balance because centres of gravity in both longitudinal and vertical directions must provide satisfactory trim and stability. Additionally, he must estimate the shaft horsepower required for the specified speed; this determines the weight of machinery. The strength of the hull must

6、 be adequate for the service intended, detailed scantlings (frame dimensions and plate thicknesses ) can be obtained from the rules of the classification society. These scantings determine the requisite weight of hull steel.The vessel should possess satisfactory steering characteristics, freedom fro

7、m troublesome vibration, and should comply with the many varied requirements of international regulations. Possessing an attractive appearance, the ship should have the minimum net register tonnage, the factor on which harbour and other dues are based. (The gross tonnage represents the volume of all

8、 closed-in spaces above the inner bottom. The net tonnage is the gross tonnage minus certain deductible spaces that do not produce revenue. Net tonnage can therefore be regarded as a measure of the earning capacity of the ship, hence its use as a basis for harbour and docking charges. ) Passenger ve

9、ssels must satisfy a standard of bulkhead subdivision that will ensure adequate stability under specified conditions if the hull is pierced accidentally or through collision.Compromise plays a considerable part in producing a satisfactory design. A naval architect must be a master of approximations.

10、 If the required design closely resembles that of a ship already built for which full information is available, the designer can calculate the effects of differences between this ship and the projected ship. If, however, this information is not available, he must first produce coefficients based upo

11、n experience and, after refining them, check the results by calculation.TrainingThere are four major requirements for a good naval architect. The first is a clear understanding of the fundamental principles of applied science, particularly those aspects of science that have direct application to shi

12、psmathematics, physics, mechanics, fluid mechanics, materials, structural strength, stability, resistance,and propulsion. The second is a detailed knowledge of past and present practice in shipbuilding. The third is personal experience of accepted methods in the design, construction, and operation o

13、f ships; and the fourth, and perhaps most important, is an aptitude for tackling new technical problems and of devising practical solutions.The professional training of naval architects differs widely in the various maritime countries. Unimany universities and polytechnic schools; such academic trai

14、ning must be supplemented by practical experience in a shipyard. Trends in designThe introduction of calculating machines and computers has facilitated the complex calculations required innaval architecture and has also introduced new concepts in design. There are many combinations of length, breadt

15、h, and draft that will give a required displacement. Electronic computers make it possible to prepare series of designs for a vessel to operate in a particular service and to assess the economic returns to the shipowner for each separate design. Such a procedure is best carried out as a joint exerci

16、se by owner and builder. As ships increase in size and cost, such combined technical and economic studies can be expected to become more common.(From “ Encyclopedia Britannica , Vol. 16, 1980)Technical terms1.naval architect 造船工程设计师 naval architecture 造船工程学32. scantling 结构件尺寸33. frame 肋骨2.instructio

17、n 任务书、指导书34. classification society 船级社3.oil tanker 油轮35. steering 操舵、驾驶4.deadweight 载重量36. vibration 振动5.knot 节37. net register tonnage 净登记吨位6.specification 规格书，设计任务书38. harbour 港口7.vessel 船舶39. dues 税收8.cargo 货物40. gross tonnage 总吨位9.passe nger 旅客41. deductible space 扣除空间10.trade 贸易42. revenue 收入1

18、1.machinery 机械、机器43. docking 进坞12.hold capacity 舱容44. charge 费用、电荷13.consumable store 消耗物品45. bulkhead 舱壁14.light weight 轻载重量、空船重量46. subdivision 分舱隔、细分15.hull 船体47. collision 碰撞16.dimension 尺度、量纲、维数48. compromise 折衷、调和17.displacement 排水量、位移、置换49. coefficient 系数18.tonnage 吨位50. training 培训19.finenes

19、s 纤瘦度51. fluid mechanics 流体力学20.draft 吃水52. structural strength 结构强度21.breadth 船宽53. resistance 阻力22.freeboard 干舷54. propulsion 推进23.rule 标准55. shipbuilding 造船24.tentative 试用暂行的56. aptitude 特殊才能，适应性25.longitudinal direction 纵向57. maritime 航运，海运26.vertical direction 垂向58. polytechnical school 工艺科技学校2

20、7.trim 纵倾59. academic 学术的28.stability 稳性60. shipyard 造船厂29.shaft horse power 轴马力61. electronic computer 电子电脑30.strength 强度62. owner 船主，物主31.service 航区、效劳63. encyclop(a)edia 百科全书Additional Terms and ExpressionsEngineers (SNAME) 美国造船师与轮机1. the Chinese Society of Naval Architecture and Marine Engineeri

21、ng (CSNAME) 中 国造船工程学会2. the Chinese Society of Navigation 中国航3. “ Shipbuilding of China 中国造船4. Ship Engineering 船舶工程5. “Naval 安定 Merchant Ships 舰船知 识6. China State Shipbuilding Corporation (CSSC) 中国船舶工业总公司7. China offshore Platform Engineering Corporation (COPECO) 中国海洋石油 平台工程公司8. Royal Institution o

22、f Naval Architects (RINA) 英国皇家造船工程师学会工程师协会10. Principle of naval architecture 造船原理11. ship statics (or statics of naval architecture) 造船静力学12. ship dynamics 船舶动力学13. ship resistance and propulsion 船舶阻力 和推进14. ship rolling and pitching 船舶摇摆15. ship manoeuvrability 船舶操纵性16. ship construction 船舶结构17. s

23、hip structural mechanics 船舶结构力学18. ship strength and structural design 船舶 强度和结构设计19. ship design 船舶设计20. shipbuilding technology 造船工艺21. marine (or ocean) engineering 海洋工程9. Society of Naval Architects and MarineNote to the Text1. range from A to B 的意思为“从 A 到 B 的范围内，翻译时，根据这个根本意思可以按汉语习惯译成 中 文。例：Lathe

24、 sizes range from very little lathes with the length of the bed in several inches to very large ones turning a work many feet in length. 车床有大有小，小的车床其车身只有几英寸，大的车床能车削数英尺长的工件。2. Such that可以认为是such a kind/value等的缩写，意思为"这样的类别/值等以至于。译成中文是，可根据具体情况加以意译。例：The depth of the chain locker is such that the c

25、able is easily stowed. 锚链舱的深度应该使锚链容易存储。Possessing an attractive appearance, the ship should have the minimum net register tonnage,the factor on which harbour and oyher dues are based.Possessi ng an attractive appeara nee现在分词短语，用作表示条件的状语，意译成"船舶除有一个漂亮的 外形。一般说，如分词短语谓语句首，通常表示时间、条件、原因等。The factor on

26、 whichare b中s的dthe factor 是前面 the minimum net register tonnage 的铜谓语，而 onwhich are base(是定语从句，修饰 the factor。4. Electroniccomputers make it possible to prepare series id designs for a vessel to operate in a particular service and to assess the economic returns to the shipowner for each separate design

27、.句中的 it 是形式宾语，实际宾语为不定式短语to prepare series of desig ns禾口 to-assess the econo mic returnsLesson TwoDefinitions, Principal DimensionsBefore studying in detail the various technical branches of naval architecture it is important to define chapters. The purpose of this chapter is to explain these terms a

28、nd to familiarise the reader with them. In the first place the dimensions by which the size of a ship is measured will be considered; they are referred to as principal dimensions ' . The ship, like any solid body, requires three dimensions to define its size, and these are a length, a breadth an

29、d a depth. Each of these will be considered in turn.Principal dimensionsLengthThere are various ways of defining the length of a ship, but first the length between perpendiculars will be considered. The length between perpendiculars is the distance measured parallel to the base at the level of the s

30、ummer load waterline from the after perpendicular to the forward perpendicular. The after perpendicular is taken as the after side of the rudder post where there is such a post, and the forward perpendicular is the vertical line drawn through the intersection of the stem with summer load waterline.

31、In ships where there is no rudder post the after perpendicular is taken as the line passing through the centre line of the rudder pintals. The perpendiculars and the length between perpendiculars are shown in Figure 1.The length between perpendiculars (L BP) is used for calculation purposes as will

32、be seen later, but it will be obvious from Figure 1 that this does not represent the greatest length of the ship. For many purposes, such as the docking of a ship, it is necessary to know what the greatest length of the ship is. This length is known as the length of the extreme point at the after en

33、d to a similar point at the forward end. This can be clearly seen by referring again to Figure 1. In most ships the length overall will exceed by a considerable amount the length between perpendiculars. The excess will include the overhang of the stern and also that of the stem where the stem is rak

34、ed forward. In modern ships having large bulbous bows the length overall L OA may have to be measured to the extreme point of the bulb.A third length which is often used, particularly when dealing with ship resistance, is the length on the waterline LWL. This is the distance measured on the waterlin

35、e at which the ship is floating from the intersection of the stern with the waterline to the length is not a fixed quantity for a particular ship, as it will depend upon the waterline at which the ship is floating and upon the trim of the ship. This length is also shown in Figure 1 .Mu«£Q&

36、#39;vdUpp窖严ofSunher toid w+erlineAf tfr 弓©!芒 of rUdol'Br 口os-l ©f c:电ntr砂 lln合 of r utfdef plnllslength be十岬已尹n perpefidfculor.EP*1Forword sheers口广翱Qird side oFrL'?J£a_ju 话 IJI-iB-CL!1biikiQus bowLgegi两 心初i w<5tprjiirbeL&riDth overalULtIA>F'lQ 1BreadthThe mid point of the length between perpendiculars is called amidships ' and the ship is usually bropoint. The breadth is measured at this position and the breadth most commonly used is called the breadth moulded ' . It may be defi ned simply as the dista nce from the in s