当前位置: X-MOL 学术Comput. Struct. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
A practical three-dimensional wheel-rail interaction element for dynamic response analysis of vehicle-track systems
Computers & Structures ( IF 4.7 ) Pub Date : 2021-06-05 , DOI: 10.1016/j.compstruc.2021.106581
Yongdou Liu , Pedro A. Montenegro , Quan Gu , Wei Guo , Rui Calçada , João Pombo

A novel practical three-dimensional (3D) wheel-rail interaction (WRI) element is developed to simulate the interaction between a fast-moving wheel node and nodes of the rail. Different from most previous methods of wheel-rail contact in multibody dynamics, the wheel-rail relationship in this paper is simulated by the WRI element. The WRI element is implemented into a general finite element software framework (i.e., OpenSees), which allows us study not only the vehicle behavior as the multibody models allow, but also the structure behavior with any degree of complexity. Implemented in a FEM framework with strong nonlinear capabilities, it also allows us to study scenarios with important nonlinearities. Compared to most existing models, the WRI element has a better compatible property and can be easily added to the vast majority of finite element platforms. The wheel-rail contact geometry is calculated efficiently with wheel/rail profiles fitted through linear curves and contact locations solved through algorithms with a higher efficiency. Local curvatures around contact points are calculated differently to avoid discontinuities of the contact force. Movements of a wheelset and of a train are studied to verify the accuracy and capability of the WRI element in the dynamic simulation of vehicle-track systems.



中文翻译:

用于车辆-轨道系统动态响应分析的实用三维轮轨交互元件

开发了一种新颖实用的三维 (3D) 轮轨交互 (WRI) 元素来模拟快速移动的车轮节点与轨道节点之间的交互。与以往多体动力学中大多数轮轨接触的方法不同,本文中的轮轨关系采用WRI单元进行模拟。WRI 单元被实现到通用有限元软件框架(即 OpenSees)中,这使我们不仅可以研究多体模型所允许的车辆行为,还可以研究具有任何复杂程度的结构行为。在具有强大非线性能力的 FEM 框架中实施,它还允许我们研究具有重要非线性的场景。与大多数现有模型相比,WRI 单元具有更好的兼容性,可以轻松添加到绝大多数有限元平台中。轮轨接触几何通过线性曲线拟合的轮轨轮廓和通过算法求解的接触位置高效计算,效率更高。以不同方式计算接触点周围的局部曲率以避免接触力的不连续性。研究了轮对和火车的运动,以验证 WRI 元件在车辆-轨道系统动态模拟中的准确性和能力。以不同方式计算接触点周围的局部曲率以避免接触力的不连续性。研究了轮对和火车的运动,以验证 WRI 元件在车辆-轨道系统动态模拟中的准确性和能力。以不同方式计算接触点周围的局部曲率以避免接触力的不连续性。研究了轮对和火车的运动,以验证 WRI 元件在车辆-轨道系统动态模拟中的准确性和能力。

更新日期:2021-06-05
down
wechat
bug