Wave propagation analysis of the overhead conductor rail system based on numerical simulation and full-scale experiment

IF 4.5 1区工程技术 Q1 ENGINEERING, MECHANICAL

Mechanism and Machine Theory Pub Date : 2024-08-14 DOI:10.1016/j.mechmachtheory.2024.105769

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引用次数: 0

Abstract

The overhead conductor rail system (OCR) is an important current-transmitting structure for electric trains in tunnels. As the train speed increases, the wave propagation behaviour in the OCR plays an ever-increasingly important role in affecting the current collection quality. This paper is the first endeavour to numerically and experimentally explore wave behaviours in the OCR. With the help of a finite element model, the spatial propagation and frequency-domain characteristics of the wave propagation are investigated. Based on the time-space distribution of waves, the wave speed of the OCR is identified. Subsequently, a full-scale experimental test is conducted to identify a real-life OCR's wave speed for the first time. The relative error between the simulated and experimental speed is only 5.50 %, highlighting the effectiveness of the presented model. Then, the influence of wave propagation on the interaction performance of pantograph-OCR is analysed. A significant reduction of the interaction performance is observed when the train speed approaches the wave speed. Through sensitivity analysis, the bending stiffness, the linear density, and the span length are identified as sensitive parameters affecting the wave speed.

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基于数值模拟和全尺寸实验的架空导轨系统波传播分析

架空导轨系统（OCR）是隧道内电力列车的重要电流传输结构。随着列车速度的增加，OCR 中的波传播行为在影响电流收集质量方面发挥着越来越重要的作用。本文首次尝试通过数值和实验来探索 OCR 中的波行为。在有限元模型的帮助下，研究了波的空间传播和频域特征。根据波的时空分布，确定了 OCR 的波速。随后，进行了全面的实验测试，首次确定了现实中 OCR 的波速。模拟波速与实验波速的相对误差仅为 5.50%，凸显了模型的有效性。然后，分析了波传播对受电弓-OCR 交互性能的影响。当列车速度接近波速时，相互作用性能明显降低。通过敏感性分析，确定了弯曲刚度、线性密度和跨度长度是影响波速的敏感参数。

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

Mechanism and Machine Theory 工程技术-工程：机械

CiteScore

9.90

自引率

23.10%

发文量

450

审稿时长

20 days

期刊介绍： Mechanism and Machine Theory provides a medium of communication between engineers and scientists engaged in research and development within the fields of knowledge embraced by IFToMM, the International Federation for the Promotion of Mechanism and Machine Science, therefore affiliated with IFToMM as its official research journal. The main topics are: Design Theory and Methodology; Haptics and Human-Machine-Interfaces; Robotics, Mechatronics and Micro-Machines; Mechanisms, Mechanical Transmissions and Machines; Kinematics, Dynamics, and Control of Mechanical Systems; Applications to Bioengineering and Molecular Chemistry