典型舱内爆炸载荷作用下吸能元件防护特性研究  

Protective characteristics of energy absorbing elements under typical cabin explosion loads

作　　者：姚梦雷 侯海量[1] 李典[1] YAO Mengei;HOU Haiiang;LI Dian(College of Naval Architecture and Ocean Engineering,Naval University of Engineering,Wuhan 430033,China)

机构地区：[1]海军工程大学舰船与海洋学院,湖北武汉430033

出　　处：《中国舰船研究》2024年第3期182-192,共11页Chinese Journal of Ship Research

基　　金：国家自然科学基金资助项目(51979277,52271338);国家自然科学基金青年基金资助项目(52101378)。

摘　　要：[目的]旨在探讨舱内爆炸冲击波与准静态气压载荷共同作用下的抗爆吸能芯层设计方法。[方法]采用有限元数值计算,分析屈服型和屈曲型这2种典型吸能元件在舱内爆炸冲击波与准静态气压载荷作用下的特性(如载荷削弱因子、吸能特性、变形破坏模式以及下面板中心点的最大位移),获得抗爆吸能芯层的防护能力特点。随后,基于此提出一种抵抗舱内爆炸冲击波与准静态气压载荷共同作用的双刚度吸能元件,并通过仿真与上述2种典型吸能元件进行对比。[结果]结果表明:在爆炸冲击波载荷作用下,屈服型吸能元件载荷耗散与吸能能力优于屈曲型;在准静态气压载荷作用下,屈服型吸能元件变形受载荷作用时间影响较大,而屈曲型吸能元件的变形几乎不受作用时间的影响;在冲击波和准静态载荷的共同作用下,双刚度吸能元件的防护能力优于单刚度的上述2种典型吸能元件。[结论]研究结果可为抵抗舱内爆炸载荷防护形式设计提供新的思路。[Objective]This study explores design methods for explosion-resistant energy-absorbing core elements in cabin subject to the joint effects of blast-induced shockwave and quasi-static barometric pressure.[Methods]Finite element numerical calculations are used to analyze the characteristics of flexing-type and yielding-type energy-absorbing elements in the above conditions in terms of load weakening factor,energy ab-sorption,deformation damage mode and maximum displacement at the center point of the lower panel,and the protective performance characteristics are obtained.On this basis,a dual-stiffness energy-absorbing element is proposed to resist the combined action of blast-induced shockwave and quasi-static barometric pressure and its performance is then compared with that of the two energy-absorbing elements.[Results]Under the action of blast-induced shockwave,the load dissipation and energy absorption ability of the yielding-type energy-absorbing element is better than that of the flexing-type energy-absorbing element;under the action of quasi-static barometric pressure,the deformation of the yielding-type energy-absorbing element is greatly affected by the time of action of the load,while the deformation of the flexing-type energy-absorbing element is almost unaffected by the time of action;under the combined action of blast-induced shockwave and quasi-static baro-metric pressure,the protection ability of the dual-stiffness energy-absorbing element is better than that of the single-stiffness flexing-type and yielding-type energy-absorbing elements.[Conclusion]The results of this study can provide a new approach to the design of explosion-resistant configurations in cabins.

关 键 词：舱内爆炸载荷 吸能元件 变形形貌 防护性能 

分 类 号：U674.7[交通运输工程—船舶及航道工程] U661.4[交通运输工程—船舶与海洋工程]