口徑縮比彈體打擊NSC靶體工況,對比了所提出方法與傳統(tǒng)侵徹靜爆法預(yù)測靶體損傷破壞的差異,分析了侵徹爆炸應(yīng)力場的疊加效應(yīng)以及彈殼約束和斷裂破片的影響,并基于彈載裝藥在不同時刻起爆下靶體的破壞特征,確定了戰(zhàn)斗部最不利起爆時刻。最后,針對SDB、WDU-43/B和BLU-109/B等3種原型戰(zhàn)斗部打擊工況開展數(shù)值模擬,其侵徹動爆作用下的NSC和UHPC遮彈層的破壞深度分別為1 . 3 3 、 2 . 7 0 、 2 . 3 5m 和0.79、1.76、1.70m ,進一步給出了相應(yīng)的遮彈層臨界震塌厚度和臨界貫穿厚度。結(jié)果表明,采用侵徹動爆一體化方法計算得到的破壞深度、臨界震塌厚度和臨界貫穿厚度較傳統(tǒng)侵徹靜爆法計算結(jié)果增大約5 % ~ 3 0 % 。-龍源期刊網(wǎng)" />

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基于戰(zhàn)斗部侵徹動爆一體化效應(yīng)的遮彈層設(shè)計

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中圖分類號:0385 國標學(xué)科代碼:1303530 文獻標志碼: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

通常在防護結(jié)構(gòu)的重要部位設(shè)置普通混凝土(normal strength concrete,NSC)或超高性能混凝土(ultra-high performance concrete,UHPC)遮彈層,以抵抗鉆地武器戰(zhàn)斗部的侵徹和爆炸作用,合理設(shè)計遮彈層厚度可以有效地保障結(jié)構(gòu)內(nèi)部人員和裝備的安全。(剩余20077字)

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