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摘要: 以300kDWT超大型油轮(VLCC)货舱区舷侧结构为研究对象,利用有限元软件MSC.Dytran对 该VLCC在满载和压载工况下的碰撞损伤机理及耐撞性能进行研究,通过对碰撞过程中液货与结构之间的 流-固耦合力、碰撞力、结构变形、结构吸能等进行计算分析,并将这些参数与空载工况下的计算结果进行了对 比分析,阐述舱内液体对结构损伤机理及碰撞性能的影响。研究表明,舱内液货对VLCC舷侧结构碰撞后期 的损伤变形、碰撞力等产生一定影响,对整体碰撞性能影响较小;压载水对结构的损伤机理、耐撞性能均产生 显著影响,结构的变形模式发生明显改变,碰撞力显著增大,系统吸能大幅增加,其耐撞性能显著提高。Abstract: Thedouble-sidedstructureofaverylargecrudecarrier(VLCC)cargoholdwaschosenas theresearchobject.Thenonlinearfiniteelementcode,MSC.Dytranwasappliedtoinvestigatenumericallythecollisiondamagemechanismandcrashworthinessofthisstructureunderfullloadand ballastconditions.Andthecorrespondingparameters,includingfluid-structureinteractionpressure, collisionforce,deformationandenergyabsorbing,werecomputedandcomparedwiththeresultsunderlightloadconditions. Theresultsshowthattheliquidcargoaffectstoacertainextentthestructuraldamagedeformationandcollisionforceinthelaterstageofcollisi nbutinfluencesweaklythe wholecrashworthinessofthisstructure.Ballastwaterhasremarkableeffectondamagemechanism, crashworthinessperformanceanddeformationpatterns.Thefluid-structureinteractionforcecancause significantchangesindeformationpatterns,remarkableincreaseinimpactforceandenergyabsorption, evidentimproveincrashworthiness.
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Key words:
- solidmechanics /
- damagemechanism /
- fluid-structureinteraction /
- verylargecrudecarrier /
- crashworthiness /
- shipcollision /
- fullload /
- ballast
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