摘要:
针对破片撞击液舱外板,建立分析模型探讨背水靶板的穿甲过程。以能量分析为基础,根据破片
穿甲的运动方程和德玛尔模型,推导破片穿透背水靶板后的剩余速度公式。根据给出的剩余速度公式,计
算不同初始速度(1.0~1.6km/s)的破片穿透背水靶板后的剩余速度,根据已有剩余速度公式计算破片以同
样的初始速度穿透背空靶板后的剩余速度,并用非线性动力学分析软件AUTODYN 对相应的破片穿甲过程
进行数值模拟。模拟结果能较好地与理论计算结果相吻合。与破片穿透空背靶板的情况相比,破片穿透背水
靶板后剩余速度降低更明显。破片初始速度越高,板后的液体对破片阻碍作用越明显,破片速度降越大。
Abstract:
Aimedatfragmentpenetrationintofluidcabinbulkhead,atheoreticalanalysismodelwas
establishedtoexplorethepenetrationprocessofwater-backedtargets.Basedontheenergyanalysis,a
formulafortheresidualvelocityofthefragmentafterthewater-backedtargetpenetrationwasderived
bycombiningthemotionequationandtheDeMarremodel.Thederivedformulawasappliedtocalculatetheresidualvelocitiesofthefragmentswiththeinitialvelocitiesof1.0~
1.6km/s.Andthepenetrationprocessofthefragmentsintothewater-
backedtargetwasmodeledbyusingthenon-lineardynamicsanalysissoftware,
AUTODYN.Theresidualvelocitiesbythederivedformulaareinagreementwiththosebythesoftware,
AUTODYN.Theresidualvelocitiesobtainedabovewerecompared
withthosebytheexistentformulaforthefragmentswiththesameinitialvelocitiesaftertheairbackedtargetpenetration.
Comparisonshowsthatthefluidbehindthebulkheadcanpreventfragment
penetrationtoacertainextent,andthattheresidualvelocityinthecaseoftheair-backedtargetpenetrationismarkedlylowerthanthatinthecaseofthewater-
backedtargetpenetration.Thehigherthe
initialvelocityofthefragment,thegreaterthefluidresistance,theclearerthevelocityattenuation.
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