桥上脱轨列车姿态演变行为与倾覆风险研究OA北大核心CSTPCD
Research on posture evolution behavior and overturning risk of derailed trains on bridges
针对高速列车桥上脱轨后的车体姿态演变行为与倾覆风险问题,通过多体动力学方法,建立八编组整车-桥梁防护墙多体动力学模型并开展数值研究.首先,通过相同工况下多体动力学结果与有限元方法结果,对比验证本文模型的正确性.然后,通过数值模拟分别研究直线空载高速列车、直线满载高速列车、曲线不同离心加速度下高速列车脱轨后的动力学演变行为.研究结果表明:桥上脱轨列车与防护墙发生撞击后,会出现明显的车轮跳起和车体大幅度侧滚现象,各车存在极大从右后向左前翻滚到线路外侧坠落的风险;桥梁曲线脱轨比直线脱轨更加危险,会出现明显的甩尾现象,离心加速度越大,甩尾现象越明显.
Aiming at the posture evolution behavior of the car-body and overturning risk of the high-speed train after derailment on the bridge,a multi-body dynamics model of eight marshaling vehicles-bridge protective wall was established and numerical research was carried out through the multi-body dynamics method.Firstly,the correctness of the multi-body dynamics model in this research was verified by comparing the multi-body dynamics results with the finite element method results in the same cases.Then,the dynamic evolution behavior of high-speed train derailment in a straight line running with an empty,straight line running with fully loaded,and a curve running with different centrifugal accelerations were studied respectively through numerical simulation.The results show that after the derailed train collides with the protective wall on the bridge,there will be obvious wheel jumping and large-scale rolling of the car-body,and each car has a great risk of rolling from right rear to left front and falling to the outside of the line.The derailment of a train on a curved bridge is more dangerous than a straight-line derailment,and there will be a significant tail flick phenomenon.The greater the centrifugal acceleration,the more obvious the tail flick phenomenon.
钟睦;周伟;闫宏凯;梁习锋;鲁寨军;刘东润
中南大学交通运输工程学院,轨道交通安全教育部重点实验室,湖南长沙,410075||中南大学轨道交通安全关键技术国际合作联合实验室,湖南长沙,410075||中南大学轨道交通列车安全保障技术国家地方联合工程研究中心,湖南长沙,410075中国铁路乌鲁木齐局集团有限公司,新疆乌鲁木齐,830011
交通运输
高速列车脱轨桥梁防护墙动力学行为多体动力学
high-speed trainderailmentbridge protective walldynamic behaviormultibody dynamics
《中南大学学报(自然科学版)》 2024 (005)
1912-1921 / 10
国家重点研发计划项目(2022YFB4300304);国家自然科学基金资助项目(52302447,52388102,U2368213);中国铁路乌鲁木齐局集团有限公司"揭榜挂帅"课题(2022-kj-71)(Project(2022YFB4300304)supported by the National Key R&D Program of China;Projects(52302447,52388102,U2368213)supported by the National Natural Science Foundation of China;Project(2022-kj-71)supported by the"Revelation and Leadership"Program of China Railway Urumqi Bureau Group Co.Ltd.)
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