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ID:42688209
大小:114.00 KB
页数:14页
时间:2019-09-20
《船舶与海洋工程毕业设计----外文翻译》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、船舶与海洋工程毕业设计----外文翻译毕业设计论文外文翻译题目7500吨干货船技术设计总体方案及第三部分专业船舶与海洋工程班级学生指导教师重庆交通大学2013年ASimplePredictionFormulaofRollDampingofConventionalCargoShipsontheBasisoflkedasMethodandItsLimitationYukiKawaharaKazuyaMaekawaandYoshihoIkedaDepartmentofMarineSystemEngineeringOsak
2、aPrefectureUniversitySakai599-8531JapanSincetherolldampingofshipshassignificanteffectsofviscosityitisdifficulttocalculateittheoreticallyThereforeexperimentalresultsorsomepredictionmethodsareusedtogettherolldampingindesignstageofshipsAmongsomepredictionmethodsI
3、kedasoneiswidelyusedinmanyshipmotioncomputerprogramsUsingthemethodtherolldampingofvariousshiphullswithvariousbilgekeelscanbecalculatedtoinvestigateitscharacteristicsTocalculatetheroildampingofeachshipdetaileddataoftheshipareneededtoinputThereforeasimplerpredic
4、tionmethodisexpectedinprimarydesignstageSuchasimplemethodmustbeusefultovalidatetheresultsobtainedbyacomputercodetopredictitonthebasisofIkedasmethodtooOnthebasisofthepredictedrolldampingbyIkedasmethodforvariousshipsaverysimplepredictionformulaoftherolldampingof
5、shipsisdeducedinthepresentpaperShiphullformsaresystematicallychangedbychanginglengthbeamdraftmid-shipsectionalcoefficientandprismaticcoefficientItisfoundhoweverthatthissimpleformulacannotbeusedforshipsthathavehighpositionofthecenterofgravityAmodifiedmethodtoim
6、proveaccuracyforsuchshipsisproposedKeywordsRolldampingsimplepredictionformulawavecomponenteddycomponentbilgekeelcomponentIntroductionIn1970sstripmethodsforpredictingshipmotionsin5-degreeoffreedomsinwaveshavebeenestablishedThemethodsarebasedonpotentialflowtheor
7、iesUrsell-TasaimethodsourcedistributionmethodandsoonandcanpredictpitchheaveswayandyawmotionsofshipsinwavesinfairlygoodaccuracyInrollmotionhoweverthestripmethodsdonotworkwellbecauseofsignificantviscouseffectsontherolldampingThereforesomeempiricalformulasorexper
8、imentaldataareusedtopredicttherolldampinginthestripmethodsToimprovethepredictionofrollmotionsbythesestripmethodsoneoftheauthorscarriedoutaresearchprojecttodeveloparolldampingpredic
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