波浪荷载作用下车辆-轨道-悬浮隧道动力响应研究
Study on dynamic response of vehicle-track-submerged floating tunnel under wave load
摘要
Abstract
In order to realize the simulation and analysis of the coupling dynamic behavior of vehicle-track-submerged floating tunnel system under wave load,based on the theory of vehicle-track coupling dynamics,a dynamic interaction model of vehicle-track-submerged floating tunnel was established by introducing the wheel-rail nonlinear time-varying element matrix method and the multi-scale coupling method of structural units,and using linear spring-damping elements to simulate the anchor cable system.Based on the linear wave theory and Morison equation,the calculation method of wave load was determined.Based on the established vehicle-track-submerged floating tunnel dynamic interaction model,the numerical simulation was carried out and the vibration response characteristics and propagation law of the system during the change of parameters such as the equivalent stiffness of the anchor cable,the wave height and the driving speed under wave load were studied.The results show that the change of the equivalent stiffness of the anchor cable has a significant effect on the structural displacement of the track-submerged floating tunnel system,and increasing the equivalent stiffness of the anchor cable can effectively suppress the increase of the structural displacement.The structural displacement of the system changes significantly when the failure of some anchor cables is considered,and the increase of displacement is greater than 43%,which is not conducive to structural stability.The lateral displacement of the track-submerged floating tunnel system structure is mainly caused by wave load,and with the increase of wave height,the displacement of rail,track slab and tunnel bottom increases as a whole.In the process of engineering design,the water environment of the site should be fully investigated,and the structural parameters of the track-submerged floating tunnel system should be set reasonably to ensure the safety and stability of the vehicle-track-submerged floating tunnel system.关键词
车辆-轨道耦合动力学/车辆-轨道-悬浮隧道/线性波浪理论/锚索等效刚度/动力学响应Key words
vehicle-track coupled dynamics/vehicle-track-submerged floating tunnel/linear wave theory/equivalent stiffness of anchor cable/dynamic response分类
交通工程引用本文复制引用
徐磊,朱雪燕,赵永胜,王琨,刘鹏飞,曾志平..波浪荷载作用下车辆-轨道-悬浮隧道动力响应研究[J].中南大学学报（自然科学版）,2024,55(9):3578-3587,10.基金项目
国家重点研发计划项目(2022YFB2602800) （2022YFB2602800）
国家自然科学基金资助项目(52008404,52072249,52108185,U1934217) （52008404,52072249,52108185,U1934217）
中国科协青年人才托举工程项目(2020-2022QNRC002) （2020-2022QNRC002）
湖南省自然科学基金资助项目(2022JJ20071,2021JJ30850,2021JJ40760)(Project(2022YFB2602800)supported by the National Key R&D Program of China （2022JJ20071,2021JJ30850,2021JJ40760）
Projects(52008404,52072249,52108185,U1934217)supported by the National Natural Science Foundation of China （52008404,52072249,52108185,U1934217）
Project(2020-2022QNRC002)supported by the Youth Talent Support Project of China Association for Science and Technology （2020-2022QNRC002）
Projects(2022JJ20071,2021JJ30850,2021JJ40760)supported by the National Natural Science Foundation of Hunan Province) （2022JJ20071,2021JJ30850,2021JJ40760）
