大跨度柔性斜拉-悬索体系风-车-线路耦合振动研究  

Coupling vibration of wind-vehicle-guideway system for long span cable-stayed-suspension systems

作　　者：李永乐[1] 张明金[1] 廖海黎[1] 

机构地区：[1]西南交通大学桥梁工程系,四川成都610031

出　　处：《振动工程学报》2010年第1期69-75,共7页Journal of Vibration Engineering

基　　金：国家自然科学基金资助项目(50508036,50778155);教育部新世纪优秀人才支持计划(NCET-06-0802)

摘　　要：针对斜拉-悬索体系跨度大、刚度小以及对风和车辆作用较为敏感的特点,以一待建空中客车系统为工程背景,在分析风、车、线路三者相互作用的基础上,建立了风-车-线路非线性空间耦合分析模型。对有限元分析软件ANSYS进行二次开发,通过风荷载和车辆荷载的自动加载,实现车辆运行全过程的仿真模拟,从而得到车辆和斜拉-悬索体系的动力响应。实例分析结果表明,斜拉-悬索体系中斜拉索的位置和刚度对车辆的竖向加速度响应有显著的影响。研究结论为大跨度柔性斜拉-悬索体系的进一步优化设计提供了依据。With long spans and weak stiffness, cable-stayed-suspension systems are susceptible to both vehicles and wind. An Aerobus system which will be built in China is regarded as an engineering practice example of long span cable-stayed-suspension system in this paper. Based on the interactions among wind, vehicle and guideway, the nonlinear three-dimensional analysis model is established for the coupling vibration of the wind-vehicle-guideway system. With the wind load and vehicle load imposed automatically, the secondary development of the finite element software ANSYS has been carried out to simulate the process of vehicle running on the guideway. The dynamic response of both vehicle and cable-stayed-suspension system can be obtained by the developed software. The analysis results of the engineering example indicate that the location and stiffness of the stayed cables are important to the vertical acceleration response of vehicles. The research conclusions can provide a basis for the design optimization of long span cable-stayed-suspension system.

关 键 词：斜拉-悬索体系 风-车-线路耦合振动 风致振动 ANSYS二次开发 空中客车 

分 类 号：U448.25[建筑科学—桥梁与隧道工程] U448.27[交通运输工程—道路与铁道工程]