侵彻和爆炸作用下地铁结构毁伤破坏效应的数值模拟  

Numerical Simulation on Damage and Failure of Metro Structure under Penetration and Explosion Effects

作　　者：王银 孙杰[2] 翟永超 孙留洋 姜雅婷 宗香华 杨涛春[1] 谢群[1] WANG Yin;SUN Jie;ZHAI Yongchao;SUN Liuyang;JIANG Yating;ZONG Xianghua;YANG Taochun;XIE Qun(School of Civil Engineering and Architecture,University of Jinan,Jinan 250022,Shandong,China;Jinan Urban Construction Group Co.,Ltd.,Jinan 250031,Shandong,China;The Second Construction Limited Company of China Construction Eighth Engineering Division,Jinan 250014,Shandong,China;Tongyuan Design Group Co.,Ltd.,Jinan 250101,Shandong,China)

机构地区：[1]济南大学土木建筑学院,山东济南250022 [2]济南城建集团有限公司,山东济南250031 [3]中建八局第二建设有限公司,山东济南250014 [4]同圆设计集团股份有限公司,山东济南250101

出　　处：《高压物理学报》2025年第3期84-98,共15页Chinese Journal of High Pressure Physics

基　　金：国家自然科学基金(52408534);山东省高等学校青创科技支持计划(TJY2303);济南大学博士基金(XBS2470);济南城建集团有限公司资助项目(W2023161)。

摘　　要：以济南轨道交通7号线“水屯北路站”为例,基于LS-DYNA软件中的流-固耦合和完全重启动算法,开展了地铁结构由外及内的钻地弹先侵彻后爆炸以及由内及外的大当量TNT装药内部爆炸作用下结构毁伤破坏效应的数值模拟。首先,对已有弹体先侵彻后爆炸一次打击试验进行了数值模拟,验证了数值建模方法和材料模型参数选取的准确性。在此基础上,建立了3种由外及内的先侵彻后爆炸和3种由内及外的内爆炸三维数值模型,分析了地铁结构损伤破坏模式和对人员及附属构件的毁伤情况。数值模拟结果表明:钻地弹在地铁站上方先侵彻后爆炸作用时,地铁结构的损伤破坏模式为局部损伤;地铁结构内部爆炸时,超压峰值在爆炸近区衰减较快,在爆炸中远区衰减较慢。研究结果可为进一步探究内爆炸作用下地铁结构径向和法向冲击波传播衰减规律提供参考。Taking Shuitun North Road Station of Jinan Rail Transit Line 7 as an example,a numerical simulation study was conducted to investigate the structural damage and failure effects of the metro structure based on the fluid-structure couple and full restart algorithm in LS-DYNA software.This study focused on two scenaries:projectile penetration followed by an explosion from outside to inside,and the inner explosion of a large equivalent TNT charge.Firstly,the accuracy of the numerical simulation and the selection of material model parameters were validated through the penetration followed by explosion test.Then,three cases of two-dimensional numerical model for penetration followed by explosion from outside to inside and three cases of three-dimensional numerical models for internal explosion were established.The damage mode of the metro structure and the damage condition for personnel and auxiliary components were analyzed.The simulation results demonstrate that the failure mode of the metro structure subjected to projectile penetration followed by explosion was localized damage.When the explosion occurs inside the metro structure,the peak of overpressure decays faster in the area close to explosion and slower in the middle and far area of the explosion.The present research results can provide a reference for further studies on the radial and normal shock wave propagation attenuation laws of the metro structure subjected to internal explosion.

关 键 词：侵彻 爆炸 地铁结构 毁伤破坏 

分 类 号：O385[理学—流体力学] O521.9[理学—力学]