摘要
对100kg温压炸药坑道口部爆炸过程及冲击波传播过程进行了比例尺为1:6的缩比例数值模拟研究.通过与等质量TNT炸药模拟结果的对比,分析了温压炸药爆炸冲击波峰值超压、正压作用时间沿坑道纵深的变化规律,着重对不同伤亡等级下的冲击波毁伤范围进行了研究.结果表明:1温压炸药爆炸冲击波衰减缓慢,持续时间长,远场优势明显,在计算范围内,其峰值超压最高可达TNT的1.52倍,正压作用时间最高可达1.1倍;2拟合得到峰值超压沿坑道纵深衰减经验公式,为毁伤范围的确定奠定了基础;3拟合得到爆炸场特征方程,结合等死亡率方程及超压毁伤阈值,可以确定不同伤亡等级下的爆炸冲击波毁伤范围.
The explosion of 100 kg thermobaric explosive sited in the tunnel entrance was simulated with a scale ratio of 1：6. Change rules of shock wave peak overpressure and of overpressure duration along depth of the tunnel were analysed by comparied with TNT in the same mass, and then the damage range of the shock wave in different casualty levels was mainly studied. The following conclusions can be drawn： 1 thermobaric explosive has the characteristics of slower overpressure attenuation rate and longer overpressure duration, so it is more powerful in the explosion far-zone, with the highest of 1.52 times the peak overpressure of TNT and the highest of 1.1 times the overpressure duration of TNT in the range of calculation; 2 empirical formula of peak overpressure attenuation along depth of the tunnel is obtained by fitting the simulation data, and it is the foundation for the determination of the damage area; 3 combined with mortality rate equations and overpressure damage threshold, damage range in different casualty levels of explosive shock wave can be obtained by use of explosive characteristic equation fitted by the simulation data.
出处
《力学季刊》
CSCD
北大核心
2016年第1期184-193,共10页
Chinese Quarterly of Mechanics
关键词
温压炸药
坑道
冲击波
数值模拟
毁伤效应
thermobaric explosive（TBE）
tunnel
shock wave
numerical simulation
damage effect
