接触爆炸下舰船强力甲板塑性动态响应特性研究

Plastic Dynamic Response Characteristics of Warship's Strength Deck under Contact Explosion

基于舰船强力甲板结构和接触爆炸工况设计,采用非线性有限元计算方法对在不同炸药量下、不同尺寸的纵桁和强横梁的强力甲板进行接触爆炸数值模拟。分析球形炸药接触爆炸下空气冲击波的压力分布以及对甲板的冲击过程,结果显示强力甲板结构在接触爆炸下呈现出3种破坏模式,并通过定义构件相对强度因子,提出了破坏模式的判别条件,初步揭示舰船强力甲板在接触爆炸下的塑性动态响应特性。

Based on the design of warship＇s strength deck structure and contact explosion conditions,nu-merical simulations were carried out by introducing nonlinear element method under distinct combinations of contact explosion charges,girder and beam sizes of the strength deck.The air shock wave pressure distribution and the impact on strength deck under ball explosive contact blast were analyzed.The results show that there are three failure modes of strength deck structure under contact explosion,the research proposes criteria for failure modes through defining the relative strength factors of girder and beam,which can preliminarily describe the plastic dynamic response characteristics of strength deck under con-tact explosion.