Assessment of random dynamic behavior for EMUs high-speed train based on Monte Carlo simulation

IF 3 3区工程技术 Q2 ENGINEERING, MECHANICAL

Probabilistic Engineering Mechanics Pub Date : 2024-07-01 DOI:10.1016/j.probengmech.2024.103663

Awel Momhur , Y.X. Zhao , Abrham Gebre

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引用次数: 0

Abstract

A novel statistical method was developed to obtain a dynamic response with irregular line excitations and independent uncertain parameters. The proposed approach combines a three-dimensional vehicle-track coupling dynamics model and uncertainty parameters. Moreover, a new method is used to treat the dynamic indices: derailment coefficient, vertical/lateral wheel/rail force, vertical/lateral car body acceleration, and wheel reduction ratio. The model is validated by comparing simulations (deterministic) results with field measurements, which provide excellent agreement with limited data. According to the findings, the results reveal that the high vibration effect arises when the uncertainty parameter in the dynamic system exists. The total fit effects, the consistency of the vehicle safety, and the tail fit effects are determined for selecting the best method. Therefore, regarding the approach, the lognormal and extreme maximum distribution values may be the appropriate assumed distribution for dynamic safety under limited data.

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基于蒙特卡洛模拟的 EMU 高速列车随机动态行为评估

研究人员开发了一种新的统计方法，用于获得具有不规则线路激励和独立不确定参数的动态响应。所提出的方法结合了三维车辆-轨道耦合动力学模型和不确定性参数。此外，还采用了一种新方法来处理动态指数：脱轨系数、垂直/横向车轮/轨道力、垂直/横向车体加速度和车轮减速比。通过比较模拟（确定性）结果和现场测量结果，对模型进行了验证。研究结果表明，当动态系统中存在不确定参数时，就会产生高振动效应。总拟合效果、车辆安全性一致性和尾部拟合效果是选择最佳方法的决定因素。因此，就方法而言，对数正态分布和极值最大分布值可能是有限数据下动态安全的合适假定分布。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Probabilistic Engineering Mechanics 工程技术-工程：机械

CiteScore

3.80

自引率

15.40%

发文量

审稿时长

13.5 months

期刊介绍： This journal provides a forum for scholarly work dealing primarily with probabilistic and statistical approaches to contemporary solid/structural and fluid mechanics problems encountered in diverse technical disciplines such as aerospace, civil, marine, mechanical, and nuclear engineering. The journal aims to maintain a healthy balance between general solution techniques and problem-specific results, encouraging a fruitful exchange of ideas among disparate engineering specialities.