摘要:
为研究水下爆炸气泡载荷对船舶局部结构的毁伤效果,设计建造了实尺度舱段模型,并进行水下
爆炸实验,测量了水中压力、气泡脉动周期、舱段外板结构的动应变与塑性变形。分析了不同冲击因子作用下
舱段结构的动态响应,并结合水中压力测量结果,探讨了气泡射流的成因。在此基础之上,分析了气泡射流载
荷的影响范围以及外板在不同载荷作用下的毁伤模式。实验结果表明,相比冲击波载荷,在某些情况下射流
冲击载荷引起的结构响应更剧烈,毁伤效果更严重,因此在中近场水下爆炸作用下,气泡射流冲击载荷对船体
结构的影响不能忽视。
Abstract:
Liquidjetsformedwhenbubblescausedbyunderwaterexplosioncollapsecouldseriously
threatenthelocalstrengthofwarships.Inordertostudythedamageeffectofvesselstructuresubjectedtobubblejet,
aseriesofunderwaterexplosiontrialswereperformedbyusingatypicalcabinmodel.
Waterpressure,bubblepulsatingcycle,thedynamicstrainandplasticdeformationofoutplates
wereobtained.Dynamicalresponsesofcabinstructurewithvariousimpulsivefactorswereanalyzed,
waterpressurewasmeasured,theoccurrenceofbubblejetwasthendiscussed.Damageeffectandinfluencerangeofoutplatescausedbybubblejetwereinvestigated.
Theresultsshowedthatcompared
withshockwaveload,thejetimpactcouldconcentratebubbleenergyandcauseseriousdamagetolocalstructureofwarships.
Undercertaincircumstance,thedamageeffectcausedbybubblejetwould
bemoreseriousthanthatcausedbyshockwaveloading.Therefore,intheresearchonproximityunderwaterexplosion,
inadditiontotheshockwaveloading,thebubbleloadingcouldnotbeneglected.
点击查看大图
下载: