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(xué)碩士學(xué)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(xué)位級別：碩士專業(yè)：船舶與海洋結(jié)構(gòu)物設(shè)計制造指導(dǎo)教師：嚴(yán)仁軍20070501武漢理t大學(xué)碩士學(xué)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