舱内爆炸作用下固支方板的变形与破坏模式  

Deformation and failure modes of clamped square plates under internal blast

作　　者：李营 李延 刘海燕 王伟[2] 方岱宁[1] LI Ying;LI Yan;LIU Hai-yan;WANG Wei;FANG Dai-ning(State Key Laboratory of Explosion Science and Technology,Beijing Institute of Technology,Beijing 100081,China;Beijing Institute of Space Long March Vehicle,Beijing 100076,China;Naval Research Academy,Beijing 100161,China)

机构地区：[1]北京理工大学爆炸科学与技术国家重点实验室,北京100081 [2]北京航天长征飞行器研究所,北京100076 [3]海军研究院,北京100161

出　　处：《船舶力学》2021年第7期927-934,共8页Journal of Ship Mechanics

基　　金：国家自然科学基金资助项目(11802030)。

摘　　要：舱内爆炸与自由场爆炸载荷特点明显不同,威力比同等当量下的自由场爆炸大得多。本研究制作了内爆炸载荷发生装置,开展了不同方板在舱内爆炸作用下的动态响应与损伤特性试验,对比了舱内爆炸载荷特点、板的塑性变形、板的损伤特点,讨论了无量纲数的适用性。研究表明:(1)舱内爆炸作用下角隅处的冲击波压力峰值明显大于其他区域,但各测点的冲量趋于一致;(2)炸药相对泄爆孔位置的不同,主要通过影响准静态压力改变方板的变形,初始冲击波的影响相对较小;(3)舱内爆炸作用下固支方板的破坏模式主要为Ⅰ类破坏和Ⅱ类破坏,即整体大塑性变形破坏和边缘拉伸失效。In comparison with a free air blast,an internal blast with the same equivalent has distinguishing features and a much greater power.With an internal loading device devised,the dynamic response and failure modes of eight cases of different clamped square plates were carried out.Analysis of the loading,plastic deformation and failure modes at different gauge points leads to the following results:(1)the loading at the corner is much bigger than that at any other locations;(2)the plastic deformation of the plate with a different TNT position is mainly affected by quasi-static pressure;(3)there are two failure modes in an internal blast,i.e.Failure ModeⅠ(large inelastic deformation)and Failure ModeⅡ(tensile tearing at the boundary).

关 键 词：内部爆炸 准静态压力 空中爆炸 塑性变形 破坏模式 

分 类 号：O344.7[理学—固体力学]