基于ALE方法的加筋圆柱壳水下接触爆炸计算研究
Numerical Study of Ring-stiffened Cylindrical Shell Subjected to Underwater Contact Explosion Based on ALE Method
董金鑫 1黄伟佳 1卢熹2
作者信息
- 1. 中国人民解放军92337部队,辽宁大连 116023
- 2. 沈阳理工大学装备工程学院,沈阳 110159
- 折叠
摘要
随着水下制导技术的发展,接触爆炸对水下结构的毁伤问题越加受到关注.为研究加筋圆柱壳结构水下接触爆炸毁伤特性,采用LS-DYNA软件的任意拉格朗日-欧拉(ALE)方法模拟爆炸冲击波的形成、传播及其对圆柱壳结构的毁伤过程,探讨水下接触爆炸作用下单、双层加筋圆柱壳的毁伤响应特性,并分析不同药量和爆距条件下加筋圆柱壳的破坏模式.研究结果表明:在不同药量和爆距的水下接触爆炸条件下,加筋圆柱壳呈现多种破坏模式,加筋和加肋位置处易出现撕裂状破口,板壳结构的破坏主要表现为凹陷变形及沿着加筋位置处扩展的裂纹,其中爆距对破坏模式的影响更明显.本文结果可为水下接触爆炸冲击波作用下水下航行体结构强度分析和防护设计提供参考.
Abstract
With the development of underwater guidance technology,the problem of contact explo-sion damage to underwater structures has been more and more concerned.In order to study the un-derwater contact explosion damage characteristics of ring-stiffened cylindrical shell structure,LS-DYNA's arbitrary Lagrange-Euler method is used to simulate the formation of the explosion shock wave,propagation and its damage to the cylindrical shell structure.The underwater contact explosion under the action of a single,double-layered stiffened cylindrical shell damage response characteristics is investigated and the damage patterns of the stiffened cylindrical shell under the conditions of different charge and blast distance are analyzed.The result of research shows that:under the conditions of underwater contact explosion with different charge and blast distance,the stiffened cylindrical shell shows a variety of damage patterns,the position of the reinforcement and ribbing is prone to tear-like rupture,the damage to the plate and shell structure is mainly manifested in the depression and deformation and along the position of the reinforcement of the extended cracks,and the blast distance has a more obvious effect on the damage patterns.This study can provide a reference for the structural strength analysis and protection design of underwater navigation body under the action of underwater contact explosion shock wave.
关键词
水下接触爆炸/加筋圆柱壳/数值模拟/破坏模式Key words
underwater contact explosion/ring-stiffened cylindrical shell/numerical simulation/damage patterns引用本文复制引用
基金项目
军队能力建设重要项目(2019HJHS26)
出版年
2024
NETL
NSTL
万方数据