长持时爆炸波作用下钢结构防护门动力响应研究  

Dynamic response of steel structure protective door under long-duration blast wave

作　　者：姜龙[1] 张国凯 刘黎旺 何勇[2] 刘举 杨晓宁 张效晗 Jiang Long;Zhang Guokai;Liu Liwang;He Yong;Liu Ju;Yang Xiaoning;Zhang Xiaohan(School of Safety Science and Engineering,Nanjing University of Science and Technology,Nanjing 210094,China;School of Mechanical Engineering,Nanjing University of Science and Technology,Nanjing 210094,China)

机构地区：[1]南京理工大学安全科学与工程学院,江苏南京210094 [2]南京理工大学机械工程学院,江苏南京210094

出　　处：《南京理工大学学报》2024年第6期756-766,共11页Journal of Nanjing University of Science and Technology

基　　金：国家自然科学基金(52278504);江苏省自然科学基金(BK20220141)。

摘　　要：为了研究长持时爆炸冲击波作用下钢结构防护门动力响应行为,采用自主研发的爆炸波模拟装置对原型梁板式钢结构防护门开展了4次不同药量的爆炸试验。分析了冲击波特征参数与防护门动力响应之间的关系。在此基础上,利用LS-DYNA软件建立了有限元模型,研究了长持时爆炸载荷下防护门的响应特征与不同门板厚度组合下防护门的抗爆性能。结果表明:试验条件下爆炸波模拟装置产生的冲击波正压持时可达319 ms;准静态压力阶段冲击波呈现持续震荡的波形特征,此阶段爆炸冲量增长迅速,爆炸产生的准静态压力和冲量与药量呈正相关;长持时爆炸波作用下防护门持续发生受迫振动,响应完全的时间显著增加,试验药量下防护门的变形模式近似弹性变形;保持防护门门板总厚度不变的前提下,采用增加面板厚度、减少相应背板厚度的方式可以有效减小防护门的变形,为钢结构防护门抵抗长持时爆炸波的设计与优化提供了参考。To study the dynamic response behavior of a steel structure protective door under the action of long-duration explosion shock wave,four explosion tests with different doses are carried out on the prototype beam-slab steel structure protective door by using a self-developed explosion wave simulation device,and the relationship between the characteristic parameters of the shock wave and the dynamic response of the protective door is analyzed.On this basis,a finite element model is established by LS-DYNA software,and the response characteristics of the protective door under long-duration explosion load and the anti-explosion performances of the protective door under different door plate thickness combinations are studied.The results show that the positive pressure duration of the shock wave generated by the explosion wave simulation device can reach 319 ms under the experimental conditions.The shock wave presents the waveform characteristics of continuous oscillation in the quasi-static pressure stage.At this stage,the explosion impulse increases rapidly,and the quasi-static pressure and impulse generated by the explosion are positively correlated with the amount of explosive.Under the action of long-duration blast wave,the protective door continues to vibrate,and the time of complete response increases significantly.The deformation mode of the protective door under the test charge is approximately elastic deformation.Under the premise of keeping the total thickness of the door plate of the protective door unchanged,the deformation of the protective door can be effectively reduced by increasing the thickness of the panel and reducing the thickness of the corresponding back plate,which provides a reference for the design and optimization of the steel structure protective door against long-duration blast waves.

关 键 词：长持时爆炸波 内爆炸 准静态压力 防护门 动力响应 优化设计 

分 类 号：TJ03[兵器科学与技术—兵器发射理论与技术] O383.1[理学—流体力学]