盒型芯层波纹板的抗爆炸冲击防护性能  

Explosion Impact Protection Performance of Sandwich Structure with Box-shaped Cores

作　　者：王昊 徐斌 王舒 徐永杰[1,3] 吴浩 WANG Hao;XU Bin;WANG Shu;XU Yongjie;WU Hao(School of Mechanical and Electrical Engineering,North University of China,Taiyuan 030051,Shanxi,China;Science and Technology on Transient Impact Laboratory,No.208 Research Institute of China Ordnance Industries,Beijing 102202,China;Chongqing Hongyu Precision Industrial Co.,Ltd.,Chongqing 402760,China)

机构地区：[1]中北大学机电工程学院,山西太原030051 [2]中国兵器工业第208研究所瞬态冲击技术重点实验室,北京102202 [3]重庆红宇精密工业集团有限公司,重庆402760

出　　处：《兵工学报》2023年第12期3687-3695,共9页Acta Armamentarii

基　　金：瞬态冲击技术重点实验室基金项目(61426060101);山西省基础研究计划项目(2021690);山西省高等学校科技创新项目(2020299)。

摘　　要：针对波纹板受爆炸载荷冲击的变形吸能问题,对梯形波纹结构进行顶部开口和折叠改进,提出一种盒型结构作为波纹板芯层,以提高其在爆炸冲击载荷下的吸能特性。通过对盒型芯层的单个胞元进行准静态压缩试验,与kirigami改进梯形波纹结构对比,比较吸能值、质量比吸能、初始压垮峰值力、平均压垮力、压垮力效率等主要吸能指标。应用有限元软件建立数值模拟模型,利用试验数据对数值模拟模型进行校正,将不同长宽比的盒型结构和kirigami改进梯形波纹结构阵列排布作为波纹板芯层,对比不同芯层波纹板在相同爆炸载荷作用下的抗爆性能,分析吸能值与背板变形量等特征,并结合变形过程应力云图分析波纹板在爆炸载荷作用下的响应。研究结果表明,所提出的盒型芯层具有质量比吸能值高,变形模式均匀稳定,有效吸能行程长等优良的吸能特性,以其为芯层的波纹板在爆炸冲击载荷作用下,能有效降低背板变形,在爆炸冲击防护领域具有潜在的应用前景。In order to improve the crashworthiness of corrugated plate sandwich structure under blast loading,a new type of box-shaped thin-walled structure is proposed as the core of the corrugated plate sandwich structure to improve its energy absorption capacity.The quasi-static crushing tests are performed on the unit cell of the box-shaped thin-walled structure.The energy absorption capacity of box-shaped thin-walled structure,such as energy absorption,specific energy absorption per unit mass,initial peak crushing force,mean crushing force,and crushing force efficiency,are analyzed and compared with that of the Kirigami modified trapezoidal structure.A numerical simulation model is established with finite element software,and calibrated with the experimental results.The energy absorptions and maximum deformations of the corrugated plate sandwich structures with box-shaped cores and Kirigami modified trapezoidal cores with different geometric configurations are analyzed and compared numerically.The numerical results show that the sandwich plate with box-shaped thin-walled structure as core has excellent crashworthiness,such as higher specific energy absorption,uniform and stable deformation pattern,and longer effective energy absorption stroke.These indicate the potential applications of the proposed corrugated plate sandwich structure with box-shaped cores for enhancing the energy absorption capacity under blast loading.

关 键 词：波纹夹层结构 薄壁结构 耐撞性 准静态压缩 爆炸冲击波 有限元模拟 

分 类 号：O383.1[理学—流体力学]