PBM算法在近场爆炸数值模拟中的运用研究  

Application of Particle Blast Method on Near-field Blast Numerical Simulation

作　　者：徐自强 王丽娟 朱洁 李闯[2] 宋长杰 时小凡 XU Zi-qiang;WANG Li-juan;ZHU Jie;LI Chuang;SONG Chang-jie;SHI Xiao-fan(CCTEG Shenyang Engineering Company,Shenyang 110168,China;Shenyang Jianzhu University,Shenyang 110168,China)

机构地区：[1]中煤科工集团沈阳设计研究院,沈阳110168 [2]沈阳建筑大学,沈阳110168

出　　处：《爆破》2022年第1期29-35,共7页Blasting

基　　金：中国煤炭科工集团有限公司科技创新创业资金专项项目基金资助(2019-MS001)。

摘　　要：为探究爆炸粒子算法(PBM)在近场爆炸问题中的适用性,分别采用PBM法及任意拉格朗日-欧拉算法(ALE&S-ALE),开展AL-6XN不锈钢板近场爆炸的仿真模拟。结合T B rvik的试验结果,对比了ALE、S-ALE和PBM方法的计算精确度和运算效率;采用PBM算法对不同爆心距的钢板近场爆炸工况进行仿真计算,分析了粒子总数和粒子个数比对PBM算法计算精度的影响;通过对150 mm爆心距、球状C4炸药近场爆炸场景进行仿真,分析了不同算法运算时效占比规律。结果表明:不同工况下PBM算法得到的钢板挠度最大误差为20%,离散系数0.12,优于ALE和S-ALE算法;相同的网格划分,PBM算法运算用时仅为ALE和S-ALE算法的十分之一;粒子总数一定时,粒子数量比越接近粒子质量比或粒子个数比一定,粒子总数越多,PBM算法精度越高,模拟效果越好。In order to explore the applicability of particle blast method(PBM)in near-field blast problems,PBM and arbitrary Lagrange Eulerian algorithm(ALE&S-ALE)were used to simulate near-field blast tests of AL-6XN stainless steel plates.PBM was used to simulate the near-field blast of a steel plate with different distances to the explosion center.During this process,how the total number of particles and the particle number ratio influence the calculation accuracy of PBM was analyzed.Combined with the test results of T.B rvik,the calculation accuracy and operation efficiency of PBM,ALE and S-ALE methods were compared.By simulating the near-field blast of spherical C4 explosive 150 mm away from the explosion center the steel plate,the time proportion of different algorithms was also analyzed.The results show that under different conditions,the maximum error of steel plate deflection obtained by PBM is 20%,and the dispersion coefficient is 0.12,which is better than ALE and S-ALE algorithm.For the same mesh generation,the operation time of PBM algorithm is only one tenth of that of ALE or S-ALE algorithm.PBM has a higher accuracy and better simulation effect when the particle number ratio is closer to the particle mass ratio under certain total number of particles,or when the total number of particles is higher under certain particle number ratio.

关 键 词：近场爆炸 数值模拟 模拟方式 任意拉格朗日-欧拉算法 PBM算法 

分 类 号：TJ55[兵器科学与技术—军事化学与烟火技术]