爆炸载荷作用下金属管芯夹芯板的动态响应与吸能机理研究  

Dynamic response and energy absorption mechanism of metallic tube-core sandwich panels subjected to blast loading

作　　者：邹朋来 蔡路军[1] 张威 李嫣惠[1] 钟冬望 ZOU Penglai;CAI Lujun;ZHANG Wei;LI Yanhui;ZHONG Dongwang(Engineering Technology Research Center in Intelligent Blasting of Hubei Province,College of Science,Wuhan University of Science and Technology,Wuhan 430065,China;State Key Laboratory for Strength and Vibration of Mechanical Structures,Xi’an Jiaotong University,Xi’an 710049,China;State Key Laboratory of Precision Blasting,Jianghan University,Wuhan 430056,China)

机构地区：[1]武汉科技大学理学院湖北省智能爆破工程技术研究中心,武汉430065 [2]西安交通大学机械结构强度与振动国家重点实验室,西安710049 [3]江汉大学省部共建精细爆破国家重点实验室,武汉430056

出　　处：《振动与冲击》2024年第18期1-11,共11页Journal of Vibration and Shock

基　　金：中国博士后科学基金(2021M702537);西安交通大学机械结构强度与振动国家重点实验室开放课题项目(SV2021-KF-23);冶金工业过程系统科学湖北省重点实验室开放课题项目(Y202204);江汉大学省部共建精细爆破国家重点实验室开放课题项目(PBSKL2023B11)。

摘　　要：制备简单,价格低廉,能产生显著塑性变形的薄壁金属管芯夹芯结构在抗爆炸冲击防护领域具有广泛的应用前景。该文设计了具有面板几何非对称和芯材横向密度梯度分布的新型金属管芯夹芯板,采用数值模拟的方法对其爆炸冲击响应和能量吸收机理进行了研究。获得了金属管芯夹芯板的动态响应过程与特征,讨论了起爆高度,炸药质量,面板质量分布,芯材横向密度梯度分布对变形和能量吸收的影响。研究结果表明:金属管芯夹芯板的爆炸冲击响应过程可以分为三个阶段——芯层压缩、整体变形和弹性变形恢复;随着炸药质量的增加,起爆高度的降低,金属管芯夹芯板的后面板中心位移增加,芯层能量吸收占比下降;适当增加前、后面板厚度比和采用管芯密度正梯度分布的金属管芯夹芯板能更好地分散爆炸冲击波,提升芯层变形吸能效率,获得更好的抗爆效果。Thin-walled metallic tube-core sandwich structures due to its convenient preparation,low cost and the ability to form significant plastic deformation have broad application prospect in the field of impact protection.Novel metallic tube-core sandwich panels with geometrically asymmetric face-sheets and transverse density gradient distribution of the tubes were designed.The dynamic response and energy absorption mechanism of the sandwich panels were studied numerically.The dynamic response process and characteristics of the metallic tube-core sandwich panels were obtained,and the effects of detonation height,explosive mass,mass distribution of the panels and transverse density gradient distribution of the tubes on the deformation and energy absorption were discussed.The results show that the dynamic response process of the metallic tube-core sandwich panels can be divided into three stages:core compression,overall deformation,and elastic deformation recovery.With the increase of the explosive mass and the detonation height,the central displacement of the back face-sheet of the sandwich panels increases and the energy absorption ratio of the tube-core layer decreases.When keeping the total thickness of the face-sheet unchanged,the sandwich panel with thick front face-sheet and thin back face-sheet has strong ability to absorb energy and resist deformation.The sandwich panel with positive density gradient distribution of the cores has strong ability to resist deformation,and the sandwich panel with negative density gradient distribution of the cores has strong ability to absorb energy.The application of the metallic tube-core sandwich panel with appropriate increase in the thickness ratio of the front and back face-sheets and positive density gradient distribution of the tubes can better disperse the blast shock wave,enhance the energy absorption efficiency of the core layer,and obtain better anti-blast effect.

关 键 词：管芯夹芯结构 梯度 非对称 抗爆能力 能量吸收 

分 类 号：O347[理学—固体力学]