摘要
列车侧面爆炸环境下,车窗玻璃在强冲击载荷作用下容易破碎伤人,70%伤亡人员是由爆炸冲击波对玻璃损伤后产生的高速飞溅碎片造成.针对这一问题,以某型动车组二等座车厢的车窗为研究对象,建立带有复杂车窗结构的高速列车三维有限元模型,采用LS-DYNA软件中的CONWEP计算模型,并考虑玻璃板块间惰性气体层作用以及PVB胶的影响,结合ALE多物质算法进行数值模拟.研究结果表明,以7 kg TNT为爆炸物输入条件,当爆距为2.5 m时车窗外层玻璃冲击波超压峰值达到971.4 kPa,内外层玻璃发生大面积脱落.当爆距为4 m时,车窗玻璃板心最大位移为16.1 mm,其速度峰值为11.5mm/ms,加速度峰值为26.3 mm/ms^(2),在爆距为2.5 m时,加速度响应的最大值为945.5 mm/ms^(2),远远大于4 m时的加速度响应值.在TNT当量一定的条件下,车窗玻璃板心位移峰值、速度峰值、加速度峰值随着爆距增大呈指数型衰减.
In the explosion environment of the side of the train,the window glass is easy to break and hurt peo-ple under the strong impact load.70%of the casualties are caused by the high-speed splashing debris after the damage of the glass by the explosion shock wave.A second-class car of a certain EMU is taken as the research object,and a three-dimensional finite element model of the train with complex window structure is established.Numerical simulation study on dynamic response of the window glass under blast load was researched based on the CONWEP calculation model and ALE multi-material algorithm in LS-DYNA software with the consideration of the effect of the inert gas layer between the glass plates and the influence of the PVB glue.Taking 7 kg TNT as the blast input condition with the distance of 2.5 meters,the overpressure of the outer glass reaches 971.4 kPa,and the inner and outer glass falls off in a large area.When the distance is 4 meters,the maximum dis-placement of the window glass plate center is 16.1 mm with its peak velocity of 11.5 mm/ms and the peak ac-celeration value of 26.3 mm/(ms^(2)).When the distance is 2.5 meters,the maximum acceleration response is 945.5 mm/(ms^(2)),which is far greater than the acceleration response value when the distance is 4 meters.Un-der the condition of a certain TNT equivalent,the displacement,velocity and acceleration peaks of the window glass center are decreased exponentially with the increase of the detonation distance.
作者
张文岚
杜礼明
章芝霖
李梓豪
ZHANG Wenlan;DU Liming;ZHANG Zhilin;LI Zihao(School of Locomotive and Rolling Stock Engineering,Dalian Jiaotong University,Dalian 116028,China)
出处
《大连交通大学学报》
CAS
2021年第5期7-12,共6页
Journal of Dalian Jiaotong University
基金
国家自然科学基金资助项目(11202043)
辽宁省自然科学基金资助项目(201602112)
牵引动力国家重点实验室资助项目(TPL0906)。
