舰船结构在非接触爆炸载荷作用下的非线性分析

Nonlinear analysis of a ship under non-contact explosion

舰船在海战中经常遭受鱼雷、火炮、炸弹和导弹等武器的攻击，由于接触爆炸和非接触爆炸对舰船是致命的，所以如何正确预报爆炸载荷作用下舰船结构的变形与破损，是各国海军都十分关心的一个问题，也是生命力研究的一个重要课题。本文主要研究船体舱段遭受反舰导弹和激光制导炸弹2类武器攻击非接触爆炸后产生的塑性变形的大小和范围。采用准静态方法，根据相关文献将爆炸载荷化为静载，同时考虑材料非线性和几何非线性，对船体舱段在遭受导弹和激光炸弹攻击时进行有限元非线性分析，得出相应的结论。

The naval vessel is often suffered the attack of weapons in the sea warfare such as torpedo, cannon, bomb and guided missile, etc. Because the destruction of contact and non-contact explode to warship is deadly. So how to effectively predict the deformation and the damage of hull structures subjected to explosion load is an important problem both for every navies and for survivability study of warships. In this paper the extent and radius of plastic deformation of a compartment of a warship subjected to non-contact explosion pressure caused by anti-ship missile and laser-guided bomb were analyzed. The explosion load is transformed to static load on the basis of explosion theory and some correspondence literatures. Both nonlinear material and nonlinear geometrical are considered in the finite-element analysis. The correspondence conclusions about the compartment attacked by anti-ship missile or laser-guided bomb were obtained.