摘要
爆炸冲击波作为一种重要毁伤元,其超压峰值直接影响对目标的毁伤能力。为了探究地面类型及起爆高度对爆炸冲击波峰值的影响,利用ANSYS/AUTODYN软件建立了TNT近地爆轰模型。通过对比不同起爆高度下沙土地面和混凝土地面的冲击波超压峰值,得到以下结论:当起爆高度过低时,反射波会对爆源造成影响,可以导致冲击波超压峰值下降,且由于混凝土波阻抗较高使得这种影响在混凝土地面上更加明显。随着起爆高度的增加,装药正下方冲击波超压峰值逐渐降低;地面对装药爆轰的影响随着起爆高度的增加而降低,起爆高度增加会减小沙土地面和混凝土地面超压峰值的差异;TNT爆轰时会在沙土地面产生凹坑,凹坑能够汇聚冲击波,当观测点位于凹坑焦点时测得的冲击波超压会发生突跃。
As an important damage element,the overpressure peak of explosion shock wave directly affects the damage ability of the target.In order to explore the influence of ground type and detonation height on the peak value of explosion shock wave,a TNT near-ground detonation model was established by using ANSYS/AUTODYN software.By comparing the peak value of shock wave overpressure on sand ground and concrete ground under different initiation heights,the following conclusions were obtained:when the detonation height is too low,the reflected wave will affect the explosion source,resulting in a decrease in the peak value of shock wave overpressure.Due to the high wave impedance of concrete,this effect is more obvious on the concrete ground;the peak value of shock wave overpressure below the charge gradually decreases with the increase of detonation height.The influence of ground on charge detonation decreases with the increase of detonation height.When the detonation height increases,the difference of overpressure peak between sand ground and concrete ground decreases.TNT explosion creates a crater on the sand ground,which converge the shock wave.When the observation point is located at the focus of the crater,the measured shock wave overpressure will jump.
作者
王宁
韦利金
范少博
田石磊
付建平
任凯
陈智刚
WANG Ning;WEI Lijin;FAN Shaobo;TIAN Shilei;FU Jianping;REN Kai;CHEN Zhigang(School of Mechanical and Electrical Engineering,North University of China,Taiyuan 030051,China;Intelligent Weapon Research Institute,North University of China,Taiyuan 030051,China;Jinxi Industries Group Co.,Ltd.,Taiyuan 030027,China;Northwest Industries Group Co.,Ltd.,Xi’an 710043,China;Hebei Second Machinery Industry Co.,Ltd.,Shijiazhuang 050031,China)
出处
《中北大学学报(自然科学版)》
2025年第2期140-147,共8页
Journal of North University of China(Natural Science Edition)
关键词
冲击波
近地爆轰
超压峰值
shock wave
near-ground detonation
peak overpressure
