爆炸冲击波在变向通道中传播规律数值模拟  

Numerical Simulation of the Propagation Law of Explosion Shock Wave in Turning Tunnel

作　　者：余雯君 陈胜云 邓树新[1] 于冰冰 晋冬艳 YU Wenjun;CHEN Shengyun;DENG Shuxin;YU Bingbing;JIN Dongyan(School of Mechanical Engineering,Nanjing University of Technology,Nanjing 210094,Jiangsu,China;Institute of Defense Engineering,Academy of Military Sciences,Beijing 100850,China)

机构地区：[1]南京理工大学机械工程学院,江苏南京210094 [2]军事科学院国防工程研究院,北京100850

出　　处：《兵工学报》2023年第S01期180-188,共9页Acta Armamentarii

摘　　要：基于LS-DYNA软件对单次变向通道内TNT爆炸进行模拟以验证利用LS-DYNA模拟的准确性,研究了变向角度θ和曲率半径R对变向通道内冲击波传播规律的影响。研究结果表明,当θ和R较小时,θ和R的变化对通道变向处冲击波参数的变化影响较大,对于远场处的影响较小;当θ为90°、R为0 mm时,通道内变向处外壁面所受压力是内壁面所受压力的2.17倍;随着θ的增大,反射冲击波超压峰值减小,冲击波能量分配趋于变向后通道,远场处超压峰值先减小后增大;随着R的增加,冲击波在变向处的反射现象不明显,反射冲击波的超压峰值低;随着θ和R的增加,外壁面与内壁面所受反射压力超压峰值之差减小;当θ和R分别增加到一定程度时,改变θ和R对整个通道内冲击波参数变化的影响并不明显,但外壁面压力仍然略高于内壁面压力。Based on the LS-DYNA software,a single TNT explosion in a turning tunnel is simulated to verify the accuracy of the simulation using LS-DYNA,and the effects of the variable angleθand the radius of curvature R on the propagation law of shock wave in the turning tunnel are studied.The results show that,whenθand R are small,the changes ofθand R have a greater effect on the changes of shock wave parameters at the tunnel deflection,and the effect is smaller at the far field;whenθis 90°and R is 0 mm,the pressure on the outer wall surface at the deflection in the tunnel is 2.17 times of the pressure on the inner wall surface.With the increase ofθ,the peak overpressure of the reflected shock wave decreases,and the energy distribution of the shock wave tends to change to the back tunnel,and the peak overpressure at the far field decreases first and then increases;with the increase of R,the reflection phenomenon of the shock wave at the change of direction is not obvious,and the peak overpressure of the reflected shock wave is low;and with the increase ofθand R,the difference between the peak overpressures of the reflected pressures received by the outer wall surface and the inner wall surface decreases.Whenθand R are increased to a certain degree,respectively,the effect of changingθand R on the change of shock wave parameters in the whole tunnel is not obvious,but the pressure on the outer wall surface is still slightly higher than that on the inner wall surface.

关 键 词：冲击波传播规律 变向通道 爆炸力学 超压峰值 数值模拟 

分 类 号：O383[理学—流体力学]