基于ANSYS平台的高速列车-轨道-桥梁时变系统地震响应分析  

Seismic response analysis of a time-varying high speed train-rail-bridge system based on ANSYS

作　　者：刘常亮[1] 尹训强[1] 林皋[1] 李建波[1] 胡志强[1] 

机构地区：[1]大连理工大学海岸与近海国家重点实验室抗震分室,辽宁大连116024

出　　处：《振动与冲击》2013年第21期58-64,共7页Journal of Vibration and Shock

基　　金：十一五国家科技支撑计划项目(2009BAG12A01-K01-3)

摘　　要：以ANSYS为平台,引入虚拟节点建立轮-轨耦合时变单元,并结合UPFs开发特点在通用有限元软件中形成了,适用于地震响应分析的高速列车-轨道-桥梁时变系统模型。所提出的方法中,通过设置质点-弹簧-阻尼器模拟轨道与桥梁的相互作用,以刚体动力学方法模拟其余列车子系统,并利用有限元法模拟轨道-桥梁耦合子系统,进而基于几何相容条件和相互作用力平衡模拟了列车-轨道-桥梁时变系统的动态耦合关系,以地震加速度时程作为该系统的输入激励,通过大质量法施加于轨道-桥梁子系统中。最后,通过数值算例及实际工程应用验证了该时变系统的可靠性和良好的适用性,同时可以看出,结合通用有限元软件丰富的结构单元模型及非线性分析能力,该时变系统模型具有解决大型复杂的实际工程问题的潜力。Using ANSYS software platform, a time-variant wheel-rail coupled element with artificial nodes was introduced, combining application of user programmable features （UPFs） , a dynamic FE model for the seismic response analysis of a high-speed vehicle-rail-bridge system was formed and embedded in the popular finite element software ANSYS. With the proposed approach, the dynamic interaction of rail and bridge was modeled with mass-spring-dashpot systems, the vehicle subsystem was modeled as a rigid-body dynamic model. The vehicle-rail-bridge system was assembled through satisfying the geometric compatibility and balance of the interaction forces on the connected nodes. Earthquake acceleration time histories as the input excitations to the system were applied to the rail-bridge subsystem with the large- mass method. Finally, the reliability and good serviceability of the proposed time-varying system were verified through numerical examples and its application to actual engineering projects. It was shown that this time-varying system model has the potential to solve sophisticated and real engineering problems, combined with the rich element library and nonlinear solvers available in the commercial finite element software ANSYS.

关 键 词：高速列车 时变系统 地震响应分析 ANSYS UPFs 

分 类 号：U211.9[交通运输工程—道路与铁道工程]