侵爆作用下混凝土靶破坏效应试验与数值模拟

基于混凝土靶体的中低速侵彻后浅埋爆炸试验,开展装药长径比为5的混凝土预留孔爆炸、侵彻后裸装药爆炸及侵彻后带壳装药爆炸数值模拟研究.对比数值模拟与试验结果,验证了数值模拟模型及参数设置的合理性.结合数值模拟结果及量纲分析方法,确定了影响侵彻后带壳装药爆炸毁伤效果的主要影响因素.对比预留孔爆炸及侵彻后爆炸毁伤效果,分析了侵...

Tests and numerical simulation for damage effect of concretetarget under penetration and explosion

Here,based on shallow buried explosion tests after medium and low speed penetration of concrete target,numerical simulations for concrete reserved hole explosion with charge length-diameter ratio of 5,naked charge explosion after penetration and shell charge explosion after penetration were performed.The rationality of numerical simulation model and parametric setting was verified through comparing numerical simulation results and test ones.Combined with numerical simulation results and the dimensional analysis method,the main factors affecting the explosion damage effect of shell charge after penetration were determined.Comparing damage effects of reserved hole explosion and explosion after penetration,effects of initial damage of penetration on the damage effect of explosion were analyzed.Numerical simulations of explosions after penetration with different shell thicknesses were performed to analyze influence laws of shell thickness on explosion damage effect after penetration.The results showed that the main factors affecting the explosion effect of shell charge after penetration are the dimensionless impact coefficient I_P,the dimensionless explosion coefficient I_e and the dimensionless shell thicknessδ/d_e;with increase in I_P,the pressure relief effect of penetration pit decreases,and the damage effect of reserved hole explosion is gradually close to that of explosion after penetration;when the charge shell is thinner,the aggregation effect of detonation products enhances the explosion damage effect,while the shell is thicker,shell crushing consumes more energy and the explosion damage effect is weakened.