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.
出处
《系统仿真学报》
CAS
CSCD
北大核心
2009年第4期1011-1014,1019,共5页
Journal of System Simulation
关键词
水下爆炸
塑性响应
基本结构
数值仿真
ABAQUS
underwater explosion
plastic response
basic structures
numerical simulation
ABAQUS
