爆炸冲击载荷作用下加筋板的变形吸能特性数值分析  

Numerical analysis on deformation and energy absorption characteristics of stiffened plate under explosive impact loads

作　　者：陈鹏宇[1] 段宏[2] 侯海量[1] 焦立启 Chen Pengyu;Duan Hong;Hou Hailiang;Jiao Liqi(College of Naval Architecture and Ocean Engineering,Naval University of Engineering,Wuhan 430033,China;China Ship Development and Design Center,Wuhan 430064,China;Naval Research Academy,Beijing 100161,China)

机构地区：[1]海军工程大学舰船与海洋学院,湖北武汉430033 [2]中国舰船研究设计中心,湖北武汉430064 [3]海军研究院,北京100161

出　　处：《中国舰船研究》2019年第3期66-74,共9页Chinese Journal of Ship Research

基　　金：国家自然科学基金资助项目(51679246)

摘　　要：[目的]为研究加筋板结构在爆炸冲击波载荷作用下的变形吸能特性,[方法]利用有限元分析软件LS-DYNA模拟计算爆炸冲击波对固支加筋板毁伤作用下的变形吸能过程。以单向加筋板为研究对象,分析其变形吸能特性,得到加筋板的整体挠度和板格局部挠度,并利用两者比值来说明板格局部吸能与加筋板整体吸能的比例关系。[结果]结果表明,在爆炸冲击载荷一定的条件下,加筋板的整体变形随着相对刚度的增大而减小;板格局部挠度比值随着加筋板相对刚度的增大而增大;加筋板局部吸能与整体变形吸能的比例也随着其相对刚度的增大而增大。[结论]所提的无量纲相对刚度与挠度比的关系可为舰船抗爆及泄爆结构设计提供参考和思路。[Objectives]In order to analyze the deformation and energy absorption characteristics of the stiffened plate under explosive impact loads,[Methods]the finite element analysis software LS-DYNA is used to simulate and calculate the deformation and energy absorption of the clamped stiffened plate under the explosive impact loads. The one-way stiffened plate is taken as the study object,the deformation and energy absorption characteristics are analyzed,the overall deflection and the local deflection of the stiffened plate are obtained,the ratio of these two deflections is used to indicate the proportional relationship between the local energy absorption and the overall energy absorption of the stiffened plate.[Results]The results show that the overall deformation of the stiffened plate decreases as the relative stiffness increases under certain explosive impact loads. The ratio of the local deflection to the overall deflection increases as the relative stiffness increases. The ratio of the local energy absorption to the overall deformation and energy absorption increases as the relative stiffness increases.[Conclusions]The dimensionless relative stiffness and deflection ratio proposed in this paper can provide study references and ideas for the ship anti-explosion and venting structure design.

关 键 词：爆炸冲击 加筋板 局部吸能 数值模拟 

分 类 号：U661.43[交通运输工程—船舶及航道工程]