Study on dynamic response of vehicle−track−submerged floating tunnel under wave load

被引：0
作者：
Xu, Lei [1 ,2 ,3 ]
Zhu, Xueyan [1 ]
Zhao, Yongsheng [2 ]
Wang, Kun [1 ]
Liu, Pengfei [4 ]
Zeng, Zhiping [1 ,3 ]
机构：
[1] School of Civil Engineering, Central South University, Changsha
[2] National Engineering Research Center of High-speed Railway Construction Technology, Changsha
[3] Hunan Tieyuan Civil Engineering Testing Co. Ltd., Changsha
[4] State Key Laboratory of Mechanical Behavior and System Safety of Traffic Engineering Structures, Shijiazhuang Tiedao University, Shijiazhuang
来源：
Zhongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Central South University (Science and Technology) | 2024年 / 55卷 / 09期
基金：
中国国家自然科学基金;
关键词：
dynamic response; equivalent stiffness of anchor cable; linear wave theory; vehicle − track coupled dynamics; vehicle − track − submerged floating tunnel;
D O I：
10.11817/j.issn.1672-7207.2024.09.029
中图分类号：
学科分类号：
摘要：
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. © 2024 Central South University of Technology. All rights reserved.
引用
收藏
页码：3578 / 3587
页数：9
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