導(dǎo)管架平臺結(jié)構(gòu)優(yōu)化設(shè)計及疲勞分析.pdf

1、研究生學(xué)位論文導(dǎo)管架平臺結(jié)構(gòu)優(yōu)化設(shè)計及疲勞分析呲奎玉邑躺釃赫雌城申秈愛土撇毫王擔(dān)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(xué)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