应用SPH方法模拟近水面爆炸  

SIMULATION OF UNDERWATER EXPLOSION NEAR AIR-WATER SURFACE BY SPH METHOD

作　　者：杨刚[1] 韩旭[1] 龙述尧[2] 

机构地区：[1]湖南大学机械与汽车工程学院汽车车身先进设计制造国家重点实验室,湖南长沙410082 [2]湖南大学力学与航天航空学院,湖南长沙410082

出　　处：《工程力学》2008年第4期204-208,213,共6页Engineering Mechanics

基　　金：国防基础研究资助项目(A2220060028)

摘　　要：应用无网格光滑粒子法对近水面爆炸问题进行了数值模拟,模拟再现爆轰产物、水以及空气多种介质间的相互作用过程。相对于传统的基于网格的数值方法,SPH方法的无网格、Lagrangian性质能够自然、简单地处理爆炸产生的大变形、多介质作用等问题。通过自编程序,选用有效合理的SPH理论方法再现了近水面爆炸的复杂物理现象,定性分析了近水面爆炸的密度和压强的分布情况。通过数值模拟,近水面爆炸的复杂物理现象得到了合理再现,同时验证说明了光滑粒子法能有效地对可压缩多介质流进行计算模拟。An implementation of the smoothed particle hydrodynamic （SPH） method is adopted to investigate underwater explosion near air-water surface. The interaction between the water and the air during the process of explosion is investigated. The SPH method, as a kind of meshfree, provides a very attractive approach in dealing with large deformations and multi-material interactions. A two-dimensional SPH code is developed to simulate the complex physical phenomenon of underwater explosion near air-water surface. The distributions of the derrsity and the pressure have also been qualitatively analyzed, and some interesting results have been obtained. Finally, the results show that the SPH method can represent the physical process of underwater explosion near air-water surface. The ability of SPH method in simulating compressible multi-fluid flows has also been certified.

关 键 词：爆炸力学 水下爆炸 光滑粒子法(SPH) 多介质流 冲击波 

分 类 号：O351.2[理学—流体力学] O382.1[理学—力学]