舒瑶, 蒋忠城, 张俊, 张波, 刘国云, 杨新文. 考虑基础结构损伤的无砟轨道-车辆耦合动力模型及其求解[J]. 工程力学, 2021, 38(3): 181-191, 213. DOI: 10.6052/j.issn.1000-4750.2020.05.0305
引用本文: 舒瑶, 蒋忠城, 张俊, 张波, 刘国云, 杨新文. 考虑基础结构损伤的无砟轨道-车辆耦合动力模型及其求解[J]. 工程力学, 2021, 38(3): 181-191, 213. DOI: 10.6052/j.issn.1000-4750.2020.05.0305
SHU Yao, JIANG Zhong-cheng, ZHANG Jun, ZHANG Bo, LIU Guo-yun, YANG Xin-wen. DYNAMIC COUPLING MODEL OF BALLASTLESS TRACK-VEHICLE CONSIDERING THE BASE STRUCTURAL DAMAGE AND ITS SOLUTION[J]. Engineering Mechanics, 2021, 38(3): 181-191, 213. DOI: 10.6052/j.issn.1000-4750.2020.05.0305
Citation: SHU Yao, JIANG Zhong-cheng, ZHANG Jun, ZHANG Bo, LIU Guo-yun, YANG Xin-wen. DYNAMIC COUPLING MODEL OF BALLASTLESS TRACK-VEHICLE CONSIDERING THE BASE STRUCTURAL DAMAGE AND ITS SOLUTION[J]. Engineering Mechanics, 2021, 38(3): 181-191, 213. DOI: 10.6052/j.issn.1000-4750.2020.05.0305

考虑基础结构损伤的无砟轨道-车辆耦合动力模型及其求解

DYNAMIC COUPLING MODEL OF BALLASTLESS TRACK-VEHICLE CONSIDERING THE BASE STRUCTURAL DAMAGE AND ITS SOLUTION

  • 摘要: 为了探究无砟轨道结构损伤与车轨动态相互作用的相互影响机制,基于经典的车辆-轨道耦合动力学理论,利用混凝土弹性损伤本构考虑无砟轨道结构的损伤效应,将车辆简化为多刚体系统,并假定随机性的轨面不平顺以单节车长为周期重现,利用Hertz非线性接触实现车辆系统与含损伤无砟轨道系统的垂向传力耦合,从而建立考虑轨道结构损伤效应的无砟轨道-车辆垂向耦合周期性动力模型;为了加速该同时包含材料非线性和接触非线性的动力模型求解的收敛速度,采用隐式动力预测-校正算法和轨道-车辆系统交叉迭代的求解策略,实现了含损伤无砟轨道-车辆垂向耦合动力模型的隐式快速求解。

     

    Abstract: To explore the interaction mechanism between the damage to the ballastless track structure and the dynamic interaction of the vehicle and track, a dynamic coupling model of ballastless track-vehicle involving structural damage was established based on the classical theory of vehicle-track coupling dynamics. The damage effect of the ballastless track structure was considered by using the elastic damage constitutive model of concrete. The vehicle was simplified as a multi-body system. The random track irregularity was assumed to recur in a period of the length of a single car. Hertz nonlinear contact was used to transfer the vertical coupling force between the vehicle system and the damaged ballastless track system. To accelerate the solving convergence rate of the dynamic model including material nonlinearity and contact nonlinearity, the implicit dynamic prediction-correction algorithm and the cross iteration of the track-vehicle system were used. The solving method realized a fast and implicit solution of the dynamic vertical coupling model of vehicle and damaged ballastless track.

     

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