摘要
本文以ALE(Arbitrary Lagrange-Euler)理论为基础,结合非线性动力学的相关理论,推导了ALE方法描述的控制方程组。最后采用ALE描述方法针对集团装药在半无限土质中爆炸进行了数值模拟,并将模拟计算结果与现有实验研究成果进行了对比。在模拟给出的最大压力时程曲线和爆腔发展时程曲线的基础上,对空腔的形成和发展规律以及次生波的形成等问题进行了研究。通过对比,证明ALE算法综合了Lagrange和Euler法的优点,能够有效地用于对爆炸过程进行数值模拟。
Explosion was analyzed by using Arbitrary Lagrangian-Eulerian（ALE）algorithm, the general governing equations were derived. Finally, the 3-D numerical simulation of cylindric charge explosion in semi-infinite soil medium was successfully realized with ALE algorithm, the calculated results agree with the experiment results very well. Such as the formation and development of cavitation and the formation of secondary wave were analyzed according to the simulation results. Through the 3-D numerical simulation, it proves that the ALE method combines both the advantages of Lagrangian and Eulerian representations in a single description, so it become an efficient method for numerical simulation of explosion.
出处
《力学季刊》
CSCD
北大核心
2005年第4期639-642,共4页
Chinese Quarterly of Mechanics
基金
第二炮兵第四研究所项目"爆炸对机场道面结构的破坏研究"资助
关键词
ALE方法
爆炸
数值模拟
ALE algorithm
explosion
numerical simulation
