摘要:
利用可燃气体爆轰实验装置,通过乙炔/空气混合气体沿管道稳定爆轰后形成的冲击波对浮顶式
储油罐模型的冲击实验,分别测得模型壁面上的超压荷载、动态应变及振动加速度时程曲线。通过对比分析,
研究了大型浮顶式储油罐在爆炸冲击荷载作用下的动态响应特性及其破坏机理。在可燃气体爆炸荷载作用
下,储罐结构在变形过程中诱发罐内液体产生压缩波并对罐壁形成强烈冲击,背面液体传导的冲击压力与正
向冲击波压力量级相同,荷载作用时间大于冲击波。同时,在位于迎爆区域的储油罐内壁,顶端位置处于受拉
状态,且拉伸变形最大,为整体结构抗爆的最薄弱部位。
Abstract:
Toexplorethedynamicresponseofasuper-largeoiltankaffectedbygaseousmixtureexplosion,
impactexperimentswereconductedonfloating-roofoil-tank modelsimpactedbysteadyblast
wave,whichwasinducedbythereactionofacetylene/airmixturespropagatingalongapipe,ininflammablemixturedetonationfacilities.
Theoverpressureload,dynamicstrainandvibrationaccelerationhistoriesweremeasuredatthewallsoftheoil-
tankmodels.Thedestructionmechanismsofthe
large-scalefloating-roofoiltankunderblastloadingwereanalyzed.Inthedeformationprocessofthe
tankstructuresubjectedtoinflammablegasexplosion,theinnerliquidisinducedtogeneratecompressivewavetointensivelycollidewiththewallofthetank,
thebackwallpressuretransmittedby
liquidcollisionisinthesameorderofmagnitudewiththeblastwavepressureonthefront,buttheactuationtimeoftheformerislonger.
Meanwhile,thetopoftheoil-tankinnerwallontheblastsideis
intensilestate,encountersthemaximumtensilestrain,andhastheweakestresistancetoexplosion
andblastloadingforthewholestructure.
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