连续爆炸冲击下负泊松比超材料防护结构性能研究  

Protection performance analysis of auxetic structures under continuous explosive impact

作　　者：罗放[1] 杨德庆[1] LUO Fang;YANG Deqing(State Key Laboratory of Ocean Engineering,School of Naval Architecture,Ocean and Civil Engineering,Shanghai Jiao Tong University,Shanghai 200240,China)

机构地区：[1]上海交通大学船舶海洋与建筑工程学院海洋工程国家重点实验室,上海200240

出　　处：《振动与冲击》2022年第2期74-78,112,共6页Journal of Vibration and Shock

基　　金：国家自然科学基金项目(51479115)。

摘　　要：连续爆炸冲击现象在重大爆炸事故中经常出现,这对防护结构的性能提出更高要求。该研究对负泊松比超材料防护结构在连续爆炸冲击作用下的抗爆性能开展研究。首先,探讨了连续爆炸载荷的特点及作用方式。其次,采用数值仿真方法分析了海洋平台的负泊松比超材料防爆墙和负泊松比超材料双层横舱壁在连续爆炸冲击下的变形模式和应变分布,揭示了连续爆炸冲击下该类超材料结构的二次变形规律和毁伤机理。研究发现,内爆和外爆连续冲击载荷的作用方式并不相同,负泊松比超材料结构在连续外部及内部爆炸冲击时分别出现了局部坍塌挤压吸能、结构密实化整体弯曲等两种不同变形模式。研究结果可为防护结构连续抗爆设计提供参考。The phenomenon of continuous blasts often occurs in serious accidents,which puts forward higher requirements for the performance of protective structures.Therefore,the study on auxetic(the negative Poisson’s ratio)protective structures under continuous explosive impact has been paid more attension.The pressure,deformation mode and strain distribution of the auxetic blast wall and the auxetic double bulkhead under continuous impact were analyzed.The damage mechanism under continuous explosive impact was revealed.It is found that the continuous impact forms of internal and external blasts are different,which leads to different deformation modes of auxetic protective structures.The analysis of auxetic protective structures under continuous explosive impact provides reference to the design of protective structures.

关 键 词：连续爆炸冲击 外爆 内爆 负泊松比结构 变形模式 毁伤机理 

分 类 号：O344.5[理学—固体力学]