摘要
应用LS–DYNA有限元软件,对聚脲弹性体复合夹层结构在0.5 kg炸药(TNT)爆炸载荷作用下的动态响应过程进行数值模拟。研究了复合夹层结构厚度和质量固定条件下聚脲弹性体夹层厚度对复合夹层结构抗爆性能的影响。分析了不同聚脲弹性体夹层厚度对复合夹层结构变形的影响,并分析了聚脲弹性体夹层的吸波和吸能特性。结果表明,在爆炸载荷作用下,当复合夹层结构总厚度固定时,随着聚脲弹性体夹层厚度的减小,复合夹层结构的抗爆性能先增大后减小,当钢板与聚脲弹性体夹层厚度比为1.4∶1.2∶1.4时,变形的整体性最好,其抗爆的潜力最大,其冲击波衰减率最大为85.6%,能量吸收效果也最好,其综合抗爆能力较好;在质量固定条件下,随着聚脲弹性体夹层厚度的增加,其抗爆能力先增大后减小,当钢板与聚脲弹性体夹层厚度比为0.903∶3.5∶0.903时,其变形和能量吸收效果最好,冲击波衰减率最大为81.87%,其综合抗爆能力较好。
The dynamic response process of polyurea elastomer composite sandwich structure under0.5kg TNT explosion load was simulated by LS-DYNA finite element software.The effects of polyurea elastomer interlayer thickness on the anti-blast performance of composite sandwich structure under thickness and weight fixed conditions was studied.The influences of different interlayer thickness on the deformation of the composite sandwich structure were analyzed,and the wave absorbing and energy absorbing properties of the polyurea elastomer sandwich were also analyzed.The results show that,the anti-blast performance of the composite sandwich structure under the condition of explosion load is increased first and then decreased with the decreases of the polyurea elastomer interlayer thickness.When the steel plate and polyurea elasticity body interlayer thickness ratio is1.4∶1.2∶1.4,the deformation of the structure is the best,the shock wave attenuation is85.6%,the energy absorption is also the best,the comprehensive anti-explosive ability is better.In the limit of weight condition,the anti-blast ability increases and then decreases with the increase of the thickness of the polyurea elastomer interlayer.When the steel plate and polyurea elasticity body interlayer thickness ratio is0.903∶3.5∶0.903,the deformation and energy absorption are the best,the shock wave attenuation is up to81.87%,the comprehensive anti-explosive ability is better.
作者
王小伟
何金迎
祖旭东
王丹勇
甄建军
陈强
胡文阁
翟文
Wang Xiaowei;He Jinying;Zu Xudong;Wang Danyong;Zhen Jianjun;Chen Qiang;Hu Wenge;Zhai Wen(Institute 53, China North Industries Group Corporation, Jinan 250031, China;School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China)
出处
《工程塑料应用》
CAS
CSCD
北大核心
2017年第5期63-68,共6页
Engineering Plastics Application
基金
山东省自然科学基金项目(ZR2015EM023)
关键词
聚脲弹性体
夹层结构
变形
数值模拟
冲击波衰减
吸能
polyurea elastomer
sandwich structure
deformation
numerical simulation
shock wave attenuation
energy absorbing
