摘要
饱和土是由固体上颗粒、水和少量封闭的空气组成的三相介质。介绍了爆炸波作用下三相介质饱和土有限元基本方程的建立过程，推导了引进人工粘性项的动力有限元方程，得到在饱和土自由场中爆炸波的传播规律；不同空气含量饱和土中爆炸波随深度的衰减规律。文中还给出了有限元与有限差分间断分解结果的比较，以说明本文理论方法的有效性。
Saturated soil is a three-phase media comprised of particles of solid soil, water and a small amount of closed air.In this paper,motion equations for saturated soil under explosive loading are presented.Dynamic finite element equations in which artificial viscosity is introduced are deduced.The stability and convergence properties in the finite element analysis are preliminarily investigated.The law of propagation of explosive wave in the media with a different amount of air is obtained.The comparisons of solutions by FHM and by DEM(Gedunov's solutions )are given to verify the effectiveness of the presented method.
出处
《爆炸与冲击》
EI
CAS
CSCD
北大核心
1994年第2期97-104,共8页
Explosion and Shock Waves
关键词
三相饱和土
爆炸波
人工粘性
three-phase saturated soil
explosive loading
artificial viscosity
