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摘要: 选取某制导炸弹作为研究对象,利用任意Lagrange-Euler计算方法,通过对大口径、高弹重武器的 侵彻爆炸的全过程三维数值仿真,针对连续打击作用下大坝破坏效应进行了研究。研究表明,侵彻引起的振 动很小,引起质点振动的主要是弹药的爆炸。由于相继打击间隔时间已远超过大坝动态响应时间,相继打击 引起的坝体振动基本上不存在叠加效应。但前枚制导炸弹侵彻爆炸的破坏效应为后继制导炸弹提供了“临空 面”,使得后继制导炸弹无论是侵彻深度还是爆炸破坏范围等破坏效应都有所增大。连续打击下,爆炸后形成 的破坏范围基本上互相连通,对大坝的正常运行及安全构成威胁。Abstract: Abstract:Guidedbombsweretakenastheresearchobjectstonumericallysimulatethepenetration andexplosionprocessoflarge-aperture-heavy weaponsbyusingathree-dimensionalarbitraryLagrange- Eulerian(ALE)codeandtoexploredamageeffectsofarollercompactedconcretegravitydam undercontinuousattacksoftwoprecision-guidedbombs.Resultsshowthatthevibrationcausedby penetrationisweak,whiletheparticlevibrationismainlycausedbyammunitionexplosion.Theintermissiontimeofsequentialattacksisfarlongerthanthedynamicresponsestretchofthedam, andthe damvibrationcausedbysequentialattacksscarcelytakesonthesuperpositioneffect.Butthedamage effectofpenetrationandexplosionfortheformermissileprovidesthefreedomsurfaceforthesubsequentmissile, andthepenetrationdepthandexplosion-damagedrangeofthesubsequentmissileincrease. Theexplosion-damagedrangesbasicallyconnectwitheachother,whichthreattothenormal runningandsecurityofthedam.
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