摘要
以半穿甲反舰战斗部舱内爆炸的毁伤与防护问题为背景,研究多根单向加筋板结构在爆炸冲击波载荷作用下变形破坏特点及规律。利用有限元软件LS-DYNA开展爆炸冲击波对固支单向加筋板的毁伤作用数值仿真计算,分析近距离爆炸条件下单向加筋板的破坏过程,得到了在爆炸冲击波载荷作用下单向加筋板的变形破坏模式和典型爆炸冲击波载荷下加筋板变形规律。结果表明:加筋板在整体剪切或塑形大变形条件下,其最大无量纲挠度分别与无量纲冲击载荷和加强筋相对刚度之间呈明显的线性关系;在载荷确定情况下,通过改变加强筋相对刚度和无量纲冲击载荷可以确定加筋板失效模式以及失效模式之间转化的临界区域。
Based on the damage and protection of warship hull structure subjected to the internal blast of anti-ship missile,the deformation failure characteristics and laws of multiple one-way stiffened plate structures under blast loading are studied.The finite element software LS-DYNA is used to simulate and calculate the damage effect of blast shock wave on the one-way stiffened plate.The damage process of one-way stiffened plate under close-in explosion is analyzed.The deformation failure mode of one-way stiffened plates and the deformation law of stiffened plates under typical blast shock wave loading were obtained.The results show that the maximum dimensionless deflection has a clear linear relationship with the dimensionless impact load and the relative stiffness,respectively,under thet condition of overall shear or large plastic deformation.In the case of load determination,the failure mode of stiffened plate and the critical region of the transition between failure modes can be determined by changing the structural parameters(relative stiffness)of stiffened plate and the load parameters.
作者
焦立启
侯海量
陈鹏宇
金键
JAIO Liqi;HOU Hailiang;CHEN Pengyu;JIN Jian(College of Naval Architecture and Ocean Engineering,Naval University of Engineering,Wuhan 430033,Hubei,China)
出处
《兵工学报》
EI
CAS
CSCD
北大核心
2019年第3期592-600,共9页
Acta Armamentarii
基金
国家自然科学基金项目(51679246
51479204)
关键词
加筋板
爆炸冲击
载荷参数
变形模式
stiffened plate
blast shock wave
load parameter
deformation mode
