工程碩士英語展示PPT

1、A conference A conference on improvement of the naval ships speedon improvement of the naval ships speedCharacters in the play (in order of appearance) FuLipeng: An official of the Defense Department; Wangjia: An expert in power system of ships; Luoxiao and Yangyu: Experts in type and structure of s

2、hips; LvYanwei: An expert in hull material.Cargo shipVietnamese naval shipChinese naval shipThe factors influencing a ships speed The power is not large enough, The fuel efficiency is low.The main problems of the current warship power system:Steam,Diesel engine power,Gas turbine power drive,Diesel f

3、uel oil machine hybrid drive.The common power systems of Chinese warships ：Start-up difficultiesThe rapid response of the speed.Large qualityIncrease the warship load.Low fuel efficiencyA waste of energy.The main problems of diesel engine:Ship structures Hull is not ideal streamline Water plane area

4、 is hugeanother existing problem: air resistance 1. superstructure(上層建筑) volume is too large 2. superstructure form is too complexPresent hull materialsteelProblem：heavy weight 、low strength、low toughness、easy corrosion、no stealthBefore the service several years later Nuclear fuel instead of ordinar

5、y fuelImprovement suggestionsNuclear reactors produce fission reaction releasing enormous energy.Reason:Method:Improvement suggestionsNO1. Big powerAdvantages:Attention:Treatment of nuclear wasteNO2. Long life timeWater resistance Friction resistanceWave resistancewet surface areashape under waterli

6、neLow speedHigh speedHigh speed shipsCatamaran(雙體船)Swath(小水線面雙體船)Twin hullTwin hullCompareSmall wet hull areaHigh wave resistanceHigh friction resistancelow friction resistanceSmall water-plane areaLow wave resistance1. Change the superstructure lower and longer:methods to reduce the air resistance2

7、. Make the end of the bridge into the ladder type:3. Streamline the front of the superstructure:4. Combine the short superstructure: New materialscomposite materialadvantage：light weight 、high strength、high toughness、corrosion resistance、good stealthLCS3-littoral frigate(美國LCS3型瀕海護(hù)衛(wèi)艦)054A-frigate(中國054A型護(hù)衛(wèi)艦)warshipwarship body materiallengthwidthStandard draftMaximum speedLCS3- littoral frigateAdvance