离散轨道模型在地铁车辆一整体道床动力学 模拟中关键参数确定方法的研究

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中图分类号：U270 文献标志码：A文章编号：1006-0316（2025）12-0001-08

Abstract ：The discrete track model isadvantageous due to its model simplicity and high computational efficiency in vehicle-track coupled dynamics simulation analysis. However， insuficient accuracy of the key parameters may lead to compromised simulation accuracy.This study focuses on the vehicle-track coupled dynamics simulation of metro monolithic trackbed systems，and proposes a method utilizing a flexible track model to determine the key parameters of the disrete track model. Through comparative analysis，it is found that compared to the model with parameters determined by traditional methods，the model with parameters determined by the proposed method reduces the time-domain error of the average peak-to-peak wheel-rail force from 35.8% （original model） to 0.3% ， and the frequency-domain error of the amplitude corresponding to the dominant frequency of axle-box acceleration decreases from 49.5% to 19.4% ，which demonstrates high simulation accuracy and high computational efficiency， with only 0.15% of the computational time of the flexible track model for a single simulation. The discrete track model with key parameters determined by the method proposed provides an approach which ensures integrating accuracy and computational efficiency for metro vehicle-track coupled dynamics simulation.

Key words ： vehicle dynamics ; vehicle-track coupled dynamic model ; discrete track ; monolithic trackbed ; metro vehicle

随着我国城镇化进程的加速推进，城市发展由单一城市扩张转变为都市圈协同发展[1]。（剩余6426字）