摘要
以气泡体积加速度模型为基础研究水下爆炸气泡运动的初始条件,采用MSC.DYTRAN非线性有限元软件,结合开发的定义流场初始条件与边界条件的子程序,研究水下爆炸气泡运动特性,包括气泡的脉动、坍塌以及射流等运动特性,并将气泡脉动体积计算结果与实验及边界积分方法计算结果进行对比,验证了有限元模型的正确性与有效性。以此为基础,得到初始水深、装药量与气泡的脉动体积、最大半径、周期以及射流速度之间的关系,计算结果与经验公式具有较好的一致性。得到一些有规律性的曲线,可为相关水下爆炸气泡动态特性研究提供参考。
The volume-acceleration model was introduced to determine the initial conditions for the motion of an underwater explosion bubble. A subcode written in Fortran language was developed to define the initial and boundary conditions for the fluid field. By combining the finite element analysis software MSC. Dytran and the self-developed subcode, the dynamic behaviors of the bubble were simulated including oscillation, collapse, jet and so on. The computational volume-time curves of the bubble in this paper are more consistent with the experimental results than those by the boundary integral method. The dynamic characteristics of the bubble, which consist of volume, maximal radius, period, jet velocity, and so on, have close relations with the charge mass and water depth. The obtained curves are helpful for the correlative theory research and engineering calculation.
出处
《爆炸与冲击》
EI
CAS
CSCD
北大核心
2010年第4期342-348,共7页
Explosion and Shock Waves
基金
国防基础科研计划项目(A2220060028)
关键词
爆炸力学
气泡脉动
有限元
水下爆炸
射流
mechanics of explosion
bubble oscillation
finite element analysis
underwater explosion
jet
