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An iterative method for solving the dynamic response of railway vehicle-track coupled systems based on prediction of wheel-rail forces

机译:基于轮轨力预测的求解铁路轨道耦合系统动力响应的迭代方法

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摘要

An iterative method based on prediction of wheel-rail forces is presented to determine the dynamic response of railway vehicle-track coupled systems. The key idea of the present method lies in the modification of the starting value of each step during the iteration by prediction. The conventional iterative method begins iteration of the current step at the previously converged value of the wheel-rail forces. However, in the present method, the predicted wheel-rail forces by the Weighted Least-Squares Error (WLSE) predictor are used as the starting value for the current step. The equations of motion of the vehicle and the track subsystems are established separately and solved iteratively. According to the response of the wheelsets and the rails, and considering the track irregularity, the predicted wheel-rail forces are corrected by the wheel-rail interaction model in which detailed wheel rail contact geometry relations and nonlinear wheel rail creep forces are taken into account. The relaxation technique is adopted to solve the problem of numerical diffusion in the iterative process.
机译:提出了一种基于轮轨力预测的迭代方法来确定铁路车辆-轨道耦合系统的动力响应。本方法的关键思想在于通过预测对迭代过程中每个步骤的起始值进行修改。传统的迭代方法从轮轨力的先前收敛值开始当前步骤的迭代。然而,在本方法中,通过加权最小二乘误差(WLSE)预测器预测的轮轨力被用作当前步骤的起始值。车辆和轨道子系统的运动方程分别建立并迭代求解。根据轮对和钢轨的响应,并考虑履带的不平顺性,通过考虑详细轮轨接触几何关系和非线性轮轨蠕变力的轮轨相互作用模型来校正预测的轮轨力。 。采用松弛技术解决了迭代过程中数值扩散的问题。

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