基于战斗部侵彻动爆一体化效应的遮弹层设计

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中图分类号：0385 国标学科代码：1303530 文献标志码：A

Abstract： Accurately evaluating the continuous efect of penetration and moving charge explosion of earth penetrating weapons isthepremiseofreliabledesignof shieldontheprotectivestructure.Firstly，athre-stage integratedprojectile penetration and moving charge explosion finite element analysis method was proposed based on the technologies of volume fillingofexplosiveandthetwo-stepcouplinginpenetrationand explosion processs.Byconductingtheumericalsimulations of the existing tests ofmoving chargeexplosion，penetrationandstaticcharge explosionofnormalstrength concrete（NSC）and ultra-high performanceconcrete（UHPC）targets，the accuracyof the proposed method in describing thepropagationof explosive waves，peak stress，cracking behavioranddamage evolutionoftargetunder the penetrationandexplosion was fully verified.Besides，for the scenario of an NSC target against a -caliber scaled projectile， the differences of target damage predicted bythe proposed finite element analysis method and traditional penetrationand static charge explosion method were compared.Meanwhile，the superimposed effectofthe penetrationand explosion stress fieldand theinfluence of shel constraintand fracturefragment wereanalyzed.Basedonthedamagecharacteristicsof targetsatdifferent detonation time instantsof explosive，themostunfavorabledetonationtimeinstantofthewarheadwasdetermined.Finaly，numerical simulations were conducted for the scenarios of three prototype warheads： SDB， WDU-43/B and BLU- .The destructive depths ofNSCand UHPC shields subjected to the penetration and moving charge explosion loadings are1.33，2.70，2.35m and 0.79，1.76， ，respectively. The corresponding scabbing and perforation limits of shields were further given.The results showthatthedestructivedepths，scabbinglimitsand perforationlimitscalculated bythefiniteelementanalysis method with considering integrated penetration and moving charge explosion are about 5 % - 3 0 % higher than those calculated by the traditional penetration and static charge explosion method.

Keywords：penetrationand moving charge explosion； concrete shield； scabbing limit；perforation limit； protective design

通常在防护结构的重要部位设置普通混凝土（normal strength concrete，NSC）或超高性能混凝土（ultra-high performance concrete，UHPC）遮弹层，以抵抗钻地武器战斗部的侵彻和爆炸作用，合理设计遮弹层厚度可以有效地保障结构内部人员和装备的安全。（剩余20077字）