炸药近地爆炸的数值模拟及影响参数的分析  

Numerical Simulation and Analysis of Influence Parameters for Explosions Near Ground

作　　者：陈鑫[1,2] 高轩能[1] 

机构地区：[1]华侨大学土木工程学院,福建厦门361021 [2]福建农林大学交通与土木工程学院,福建福州350002

出　　处：《华侨大学学报（自然科学版）》2014年第5期570-575,共6页Journal of Huaqiao University(Natural Science)

基　　金：国家自然科学基金资助项目(51278208);福建省自然科学基金资助项目(2011J01319);中央高校科研业务费专项基金资助项目(JB-JC1005)

摘　　要：应用ANSYS/LS-DYNA有限元程序建模,在验证模型及参数选取正确可靠的基础上,研究了地面材料、炸药高度、空气域形状以及炸药当量等参数对马赫波超压的影响.结果表明:对于非近距离的爆炸,不同地面上的马赫波超压峰值相差不大,可简化为刚性地面;建模宜选择刚性壳体地面以及长方体空气域;与经验公式相比,数值模拟的马赫波超压峰值误差随着炸药当量的增大而减小,随着炸药高度的减小而增大.A simulation model is established by finite element program ANSYS/LS-DYNA.Based on the correctness and reliability of the model and parameters selection,the influences of different parameters on the Mach wave overpressure,including the ground material,explosive height,air domain shape and explosive equivalent on the Mach wave overpressure are investigated.The numerical results show that：1） For the explosion of non-close range,the Mach wave overpressure peaks on different grounds are similar,which can be simplified as rigid ground.2） Rigid shell ground and cuboid air domain would be chosen to establish model.3） Comparing with empirical formula,the numerical simulation error of Mach wave overpressure peak decreases with the increase of explosive equivalent,and increases with the increase of explosive height.

关 键 词：爆炸 马赫反射波 数值模拟 参数分析 TNT炸药 地面刚度 

分 类 号：O383[理学—流体力学]