改变应力状态的抗内爆炸舱壁  

Stress state changing bulkhead resistance to internal blast

作　　者：李营 张磊 杜志鹏 周心桃 肖登宝 方岱宁[1,2] LI Ying;ZHANG Lei;DU Zhi-peng;ZHOU Xin-tao;XIAO Deng-bao;FANG Dai-ning(State Key Laboratory of Explosion Science and Technology,Institute of Advanced Structure Technology,Beijing Institute of Technology,Beijing 100081,China;Beijing Key Laboratory of Lightweight Multi-functional Composite Materials and Structures,Institute of Advanced Structure Technology,Beijing Institute of Technology,Beijing 100081,China;Naval Research Academy,Beijing 100161,China;China Ship Development and Design Center,Wuhan 430064,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]北京理工大学先进结构技术研究院轻量化多功能复合材料与结构北京市重点实验室,北京100081 [3]海军研究院,北京100161 [4]中国舰船设计研究中心,武汉430064

出　　处：《船舶力学》2020年第9期1151-1157,共7页Journal of Ship Mechanics

基　　金：国家自然科学基金资助项目(11802030;11802031);北京市科委重大专项(Z181100004118002)。

摘　　要：舱壁损毁是舱内爆炸破坏范围增大的重要前提。本文根据缩比模型实验结果划分了舱内爆炸作用下的舱壁破坏模式,采用考虑应变率效应的Cowper-Symonds本构关系建立了舱壁结构有限元模型,分析了其在内爆炸作用下舱壁变形的主要过程,对比了有无弧形边界过度时舱壁的变形、塑性变形及应力状态,讨论了新型舱壁抗爆炸破损的主要机理。研究表明:(1)舱内爆炸作用下舱壁结构有大塑性变形、边缘撕裂、整体倾覆和整体吹飞等4种破坏模式;(2)新型舱壁能有效提高舱壁的抗破损能力;(3)提高抗破损能力的机理主要有两个,分别为降低局部塑性变形和剪切应力、通过改变应力状态提高材料的临界失效应变。Bulkhead damage is the important precondition for explosive damage range increase.Based on scaled experiment,failure modes of bulkheads under internal blast were categorized.After that,the numerical simulation was carried out with Cowper-Symonds model considering strain rate effect.At the same time,the deformation progress,the deformation,the plastic strain and the stress state were discussed.It is shownthat:(1)there are four failure modes(large plastic deformation,tearing at edge,overturn as a whole and fly as a whole)of bulkheads under internal blast;(2)the new bulkhead could improve blast resistance of bulkheads;(3)the two main mechanisms for improving bulkhead blast resistance are reduction of plastic strain and change of stress state to increase failure strain of metal.

关 键 词：应力状态 反舰导弹 舱内爆炸 舱壁 准静态压力 空中爆炸 

分 类 号：O383.1[理学—流体力学]