導管架平臺結(jié)構(gòu)優(yōu)化設計及疲勞分析.pdf

1、研究生學位論文導管架平臺結(jié)構(gòu)優(yōu)化設計及疲勞分析呲奎玉邑躺釃赫雌城申秈愛土撇毫王擔挑健辯嘲日期墊鰻笙壁且!壘目牛哪予日曩2旦盟生墨且中國海洋大學StudyOilOptimumDesignandFatigueAnalysisBasedonReliabilityofanOffshorePlatformAbstractAsthebasicequipmentoftheexploitationofoffshoreoil，gasresourcesan

2、dthebaseoftheworkandlivingatthesea，anoffshoreplatformisplayinganincreasinglyimportantroleinpetroleumindustriesPracticallydynamicloadingssuchaswind，wave，currentetcmaycauseaplatfo咖tovibrateexcessivelywhichaffectitssecurity

3、andworkingreliabilityTherefore，itisverynecessarytoresearchonanddevelopnewdesigntheoriesandmethodsinpursuitofeconomicefficiencyPracticalapplicationandengineeringrequirementstakenintoaccount，thedevelopmentofareliability—ba

4、sedoptimizationandfatigueanalysismethodforstructuraldesignandlifepredictionofajackettypeoffshoreplatformthatiseffectiveandaccurateispresentedinthisthesisInaccordancewiththeactualOffshorePlatformCIIofBohaiOilFieldinChina，

5、afiniteelementmodelisproperlyestablished，ofwhichthenaturalfrequencies，modalparametersofvibrationandresponseunderirregularwaveloadingsarecalculatedFirstlythereliabilityanalysisofMonteCarloMethodiscarriedoutonthestructureS

6、econdlythesizeoptimizationofcomponentsismadeonthebasisofmeetingconstraintssuchasstiffness，s仃engthandstabilityThirdlybasedonspectrummethod，thefatigueanalysisissteppedfurtherandthelifeoftheplatformisestimatedThenumericalst

7、udiesshowthattheoptimumtotalwei曲toftheplatformis511％lessthantheoriginal(thepipes’outerdiametersbeingtheinputvariables)andtheplatform’sapproximatelifeis282years，whichmeetsitsneedfullyTheresultsprovethathemethodsandtechnic

8、alsolutionspresentedinthisthesisarepracticableandsignificativeBasedontheobtainedsimulationresults，itappearsthatthisnewmethodcanprovideanadvantageousreferenceforusersengagedinstructuraldesignandsecurityevaluationofanoffsh