Nonlinear Analysis of Train Derailment in Severe Braking
Nonlinear Analysis of Train Derailment in Severe Braking
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DOI：
10.1115/1.1541669
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发表时间：
2003-03
影响因子：
1.7
通讯作者：
M. Durali;Baabak Shadmehri
中科院分区：
文献类型：
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作者：
M. Durali;Baabak Shadmehri
建立了一个非线性综合模型来研究列车在严重制动条件下的脱轨和蛇行问题。这列火车由车厢组成，每节车厢有40个车头，通过车钩和缓冲器相互连接。该模型是一个非线性的三维模型，包括一系和二系悬架的非线性弹簧和阻尼器，车身与侧架、心盘零件、轮对轴承和转向架等不同部件之间的干摩擦，以及间隙和机械制动。模型中还考虑了轮轨外形的非线性、制动回路的压力恢复延迟以及连接部件的非线性。已为列车推导出一套完整的方程。针对不同的车辆重量配置，采用强制动的情况下对方程进行了数值求解。确定了几种列车组件的脱轨系数，并研究了车轮脱轨的趋势。确定轻重车的最优配置和临界脱轨速度，使列车脱轨倾向最小。计算结果与现场经验吻合较好。
A nonlinear comprehensive model has been developed in this paper to study the train derailment and hunting in severe braking conditions. The train consists of cars each having 40 dof, connected to each other by couplers and buffers. The car model is nonlinear and three-dimensional and includes nonlinear springs and dampers of primary and secondary suspensions, dry friction between different parts such as car body and side bearers, center-plate parts, wheelset bearings and bogie frames, and also clearances and mechanical stops. Nonlinearities of wheel and rail profiles, pressure build-up delay in brake circuit, and nonlinearities of connecting parts have also been included in the model. A complete set of equations has been derived for the train. The equations are solved numerically for different car weight configurations when severe brake is applied. Derailment coefficient is determined for several train make-ups and tendency of the wheels towards derailment is investigated. Optimum configuration of cars in a light-heavy set, and critical derailment velocity can be determined to minimize the tendency of train derailment. The results are in excellent agreement with the field experience.