水下爆炸作用下基本结构塑性响应的数值仿真  

Numerical Simulation of Plastic Response of Basic Structures Subjected to Underwater Explosion

作　　者：贾宪振[1] 胡毅亭[1] 董明荣[2] 许学忠[2] 刘家骢[1] 

机构地区：[1]南京理工大学化工学院,南京210094 [2]西北核技术研究所,西安710024

出　　处：《系统仿真学报》2009年第4期1011-1014,1019,共5页Journal of System Simulation

摘　　要：在忽略结构低频响应的情况下,根据一阶逼近DAA方法得到了水下爆炸冲击波作用下结构湿面的总压力载荷表达式,并利用经验公式计算入射波压力,同时考虑局部空泡的影响,由此建立了水下爆炸冲击波作用下结构高频响应时湿面的总压力载荷的计算模型,并将该模型嵌入到了ABAQUS程序的用户自定义分布载荷子程序VDLOAD中,完成了对ABAQUS程序的二次开发,从而实现了在不建立流场模型的情况下基本结构的水下爆炸冲击响应仿真。作为验证,利用该方法仿真了固支平板和自由圆柱壳在水下爆炸冲击波作用下的塑性动态响应,仿真结果与试验结果吻合良好。Based on the first-order doubly asymptotic approximation （DAAI） without considering low-frequency response, a simple and practical method was proposed to simulate the high-frequency dynamic plastic response of basic structure including flat plate and cylindrical shell subjected to underwater explosion shock waves without modeling the fluid field. In this method, the incident wave pressure was calculated by empirical formula and local cavitation was considered. A commercial finite element code, ABAQUS, was used to carry out this method via a user-defined distribution load subroutine, VDLOAD. In order to validate this method, two examples including a fixed flat plate and a free cylindrical shell, all subjected to underwater explosion shock waves, were simulated by the method, and the simulation results are in good agreement with experiment results.

关 键 词：水下爆炸 塑性响应 基本结构 数值仿真 ABAQUS 

分 类 号：O383[理学—流体力学]