摘要
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,分析了侵彻初始损伤对爆炸毁伤效果的影响。进行不同壳体厚度的侵彻后爆炸数值模拟,分析了壳体厚度对侵彻后爆炸毁伤效果的影响规律。结果表明:影响侵彻后带壳装药爆炸效果的主要因素为无量纲冲击系数I_(P)、无量纲爆炸系数I_(e)及无量纲壳体厚度δ/d_(e);随着I_(P)的增大,侵彻坑泄压影响减小,预留孔爆炸与侵彻后爆炸的毁伤效果逐渐接近;装药壳体较薄时,爆轰产物的聚集效应增强了爆炸毁伤效果,壳体较厚时,壳体破碎消耗能量较多,爆炸毁伤效果减弱。
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.
作者
孙善政
卢浩
李杰
熊自明
邱艳宇
王德荣
SUN Shanzheng;LU Hao;LI Jie;XIONG Ziming;QIU Yanyu;WANG Derong(State Key Lab of Explosion,Impact,Disaster Prevention and Mitigation,Army Engineering University,Nanjing 210007,China)
出处
《振动与冲击》
EI
CSCD
北大核心
2022年第1期206-212,共7页
Journal of Vibration and Shock
基金
国家自然科学基金面上项目(11772355)
国家自然科学基金青年科学基金项目(51808552)。
关键词
侵彻爆炸
带壳装药
有限元分析
毁伤特征
penetration and explosion
shell charge
finite element analysis
damage characteristics
