自升式海洋平臺升降裝置疲勞強度分析.pdf

1、武漢理工大學碩士學位論文自升式海洋平臺升降裝置疲勞強度分析姓名：付敏飛申請學位級別：碩士專業(yè)：船舶與海洋結構物設計制造指導教師：嚴仁軍20070501武漢理t大學碩士學位論文AbstractOceanplatformmustwithstandextremelycomplexloadinserviceperiod，oftenwithstandsthehi曲一frequencyaltematingload，buttheelevatingge

2、aralreadyneedstocompletethespudlegandthedeckfluctuationunderthefluctuationcondition，andalsoneedssustaininghulldeckandequipmentinthenormalworkconditionandthestormTheShelfoffixup—legisaimportantconstituentofjack—upplatform

3、jackingsystemShelfoffixuplegtooktheconnectionspudlegandtheplatformmainbodymainstructure，movestheplatforminthejackupundereachkindofworkconditiontoplaythetransmissionloadroleSothereismorepossibilitythatshelfoffixup—legappe

4、arstobefatiguefailureFailureanalysisofshelfoffixup—legisverynecessaryFirst，integralspecialshellbeamelementmodelofshengli3issetup，whichhasbeencarriedonthestaticanalysistoitundertheextremewaveconditionBesides，staticstrengt

5、hoftheplatformhosthullstructureandthespudlegarecheckedaccordingtothestructuralstrengthandthestandardThen，theplatformhasbeencarriedonthemodalityanalysisandthedynamicresponseanalysisThroughthemodaiityanalysiswecanseeoscill

6、ationcharacteristicoftheplatform；alsowecangetstress—timeresponseofshelfoffixup—legthroughtheplatformdynamicresponseanalysisThuswecandeterminationhazardpoint，aswellasstress—timeresponseofhazardpointFinally，throughanalysis

7、anddisposedofstress—timeresponseofhazardpointofshelfoffixup—leg，usedthePS—Ncurvemethodandthelinearitycumulativedamagetheoryhascarriedonthecomputationtotheplatformstructurefatiguedamage，andappraisedplatformstructurefatigu