轻质金属泡沫夹芯曲板的抗爆炸冲击响应研究  

Study on Resistance of Lightweight Sandwich Curve Plates with Metal Foam Core to Blast Loadings

作　　者：秦庆华[1] 张建勋[1] 艾伟龙[1] 王铁军[1] Qinghua Qin Jianxun Zhang Weilong Ai Tiejun Wang(State Key Laboratory for Strength and Vibration of Mechanical Structures, Shaanxi Engineering Laboratory for Vibration Control of Aerospace Structures, School of Aerospace, Xi＇ an J iaotong University, Xi＇ an, 710049)

机构地区：[1]西安交通大学航天航空学院机械结构强度与振动国家重点实验室陕西省航天结构振动控制工程实验室,西安710049

出　　处：《固体力学学报》2017年第5期391-399,共9页Chinese Journal of Solid Mechanics

基　　金：国家自然科学基金(11372235;11572234和11502189);陕西省自然科学基础研究计划资助项目(2017JM1020);中国博士后科学基金(2015M572546);"中央高校基本科研业务费专项资金"资助

摘　　要：夹芯结构具有高比强度、高比刚度和优异的吸能能力,已经被广泛应用于工程结构用来抵御高强度的爆炸冲击载荷.论文采用有限元数值模拟方法研究了爆炸载荷作用下四边固支夹芯曲板的动力响应.比较了同等质量下夹芯曲板、夹芯平板、实体曲板和实体平板四种结构的抗爆炸冲击性能,讨论了不同曲率和非对称因子对结构动力响应的影响,得到了使得夹芯曲板抗爆炸性能最佳的非对称因子.研究结果表明:夹芯曲板的抗爆炸冲击性能优于等质量的夹芯平板、实体曲板和实体平板结构,增大夹芯曲板的曲率能够提高结构的抗爆炸冲击性能.Being easily shaped to curved configurations,easily formed with integral face-sheets,possessing high specific strength,high specific stiffness,superior energy absorption,and multifunctionality,sandwich structures have been widely used in engineering structures to resist intense blast loadings.Compared with the sandwich flat structures,the sandwich curve plates have different performances and provide much more choices for the design of structures.In the past decades,much attention has been focused on the dynamic response of sandwich flat structures,but few investigations of the sandwich curve structures have been conducted.In this paper,the finite element analysis is performed to study the dynamic response of fully-clamped sandwich curve plates subjected to blast loading.The maximum deflection and maximum kinetic energy of the sandwich curve plate,sandwich flat plate,solid monolithic curve plate and solid monolithic flat plate of the same mass are compared.The evolution processes of blast wave induced by TNT explosive on the face sheets of sandwich flat and sandwich curve plates are presented.The central velocity,central deflection of inner and outer face sheets,and kinetic energy of structure versus time of the sandwich curve plate under TNT explosive loading are analyzed.Effects of different curvatures and asymmetric factors on the dynamic response of sandwich curve structures are discussed.It is shown that the resistance of sandwich curve plate is the best among the plates subjected to blast loadings.An increase in the curvature of sandwich curve plate can result in an increase in the blast resistance of the structure.In certain range,increasing the thickness of the outer face sheet can decrease the deflection of the inner face sheet,and increase the resistance of sandwich curve plate under blast loading.The optimal asymmetric factor for the highest blast resistance of sandwich curve plate is obtained.

关 键 词：夹芯曲板 金属泡沫 爆炸载荷 动力响应 结构塑性 

分 类 号：TG115.5[金属学及工艺—物理冶金]