首页|波浪荷载作用下车辆-轨道-悬浮隧道动力响应研究

波浪荷载作用下车辆-轨道-悬浮隧道动力响应研究

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  • 国家科技期刊平台
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为实现波浪荷载作用下车辆-轨道-悬浮隧道系统耦合动力学行为模拟和分析，基于车辆-轨道耦合动力学理论，引入轮轨非线性时变单元矩阵法和结构单元多尺度耦合法，采用弹簧-阻尼单元模拟锚索系统，建立车辆-轨道-悬浮隧道动力相互作用模型;根据线性波浪理论和Morison方程，确定波浪荷载计算方法;最后，基于所建立的车辆-轨道-悬浮隧道动力相互作用模型开展数值仿真模拟，研究波浪荷载作用下锚索等效刚度、波浪高度、行车速度等参数变化时系统振动响应特性及传播规律。研究结果表明:锚索等效刚度变化对轨道-悬浮隧道系统结构位移的影响显著，提高锚索等效刚度能够有效抑制结构位移增大，且考虑部分锚索失效后系统结构位移变化较大，位移增幅均大于43%，不利于结构稳定;轨道-悬浮隧道系统结构的横向位移主要由波浪荷载引起，随着波浪高度增加，轨道-悬浮隧道系统结构位移整体上呈增大趋势;在工程设计过程中，应充分调研场地水环境，并合理设置轨道-悬浮隧道系统的结构参数，以确保系统的安全性和稳定性。
Study on dynamic response of vehicle-track-submerged floating tunnel under wave load
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.

vehicle-track coupled dynamicsvehicle-track-submerged floating tunnellinear wave theoryequivalent stiffness of anchor cabledynamic response

徐磊、朱雪燕、赵永胜、王琨、刘鹏飞、曾志平

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中南大学土木工程学院,湖南长沙,410075

高速铁路建造技术国家工程研究中心,湖南长沙,410075

湖南铁院土木工程检测中心,湖南长沙,410075

省部共建交通工程结构力学行为与系统安全国家重点实验室,石家庄铁道大学,河北石家庄,050043

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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

国家重点研发计划项目国家自然科学基金资助项目国家自然科学基金资助项目国家自然科学基金资助项目国家自然科学基金资助项目中国科协青年人才托举工程项目湖南省自然科学基金资助项目湖南省自然科学基金资助项目湖南省自然科学基金资助项目

2022YFB2602800520084045207224952108185U19342172020-2022QNRC0022022JJ200712021JJ308502021JJ40760

2024

10.11817/j.issn.1672-7207.2024.09.029

中南大学学报(自然科学版)
中南大学

中南大学学报(自然科学版)

CSTPCD北大核心
影响因子：0.938
ISSN：1672-7207
年,卷(期)：2024.55(9)