The effect of rail shields on railway rolling noise

IF 3.4 2区工程技术 Q2 TRANSPORTATION SCIENCE & TECHNOLOGY

International Journal of Rail Transportation Pub Date : 2022-07-26 DOI:10.1080/23248378.2022.2106599

Xianying Zhang, D. Thompson, J. Ryue, Hongseok Jeong, G. Squicciarini

引用次数: 0

Abstract

ABSTRACT Rail shields have been developed recently which are fitted around the lower part of the rail and are intended to reduce the noise radiated by the rail. Their effect on the sound radiation is investigated theoretically by using a 2.5D finite element/boundary element approach including the acoustic effects of the ground. The insertion loss due to the rail shields is predicted and compared with available measured data and the most important features of the shields are identified. The overall noise reduction when applied to railway track is determined by combining the numerical results with estimates of rolling noise from the TWINS model. The rail shields are effective in the middle frequency range, where the rail is the most important noise source. The overall A-weighted sound level is reduced by 2–3 dB for a track with soft rail pads, and 1–2 dB for a track with stiff pads.

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钢轨屏蔽层对铁路滚动噪声的影响

摘要最近开发了一种安装在钢轨下部的钢轨防护罩，旨在降低钢轨辐射的噪音。通过使用2.5D有限元/边界元方法，包括地面的声学效应，从理论上研究了它们对声辐射的影响。预测了轨道屏蔽引起的插入损耗，并与可用的测量数据进行了比较，确定了屏蔽的最重要特征。当应用于铁路轨道时，通过将数值结果与TWINS模型的滚动噪声估计相结合来确定总体降噪。钢轨屏蔽在中频范围内有效，其中钢轨是最重要的噪声源。对于带有软轨垫的轨道，整体A加权声级降低2–3 dB，对于带有硬轨垫的赛道，整体A权重声级降低1–2 dB。

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

International Journal of Rail Transportation TRANSPORTATION SCIENCE & TECHNOLOGY-

CiteScore

6.90

自引率

15.00%

发文量

期刊介绍： The unprecedented modernization and expansion of rail transportation system will require substantial new efforts in scientific research for field-deployable technologies. The International Journal of Rail Transportation (IJRT) aims to provide an open forum for scientists, researchers, and engineers in the world to promote the exchange of the latest scientific and technological innovations in rail transportation; and to advance the state-of-the-art engineering and practices for various types of rail based transportation systems. IJRT covers all main areas of rail vehicle, infrastructure, traction power, operation, communication, and environment. The journal publishes original, significant articles on topics in dynamics and mechanics of rail vehicle, track, and bridge system; planning and design, construction, operation, inspection, and maintenance of rail infrastructure; train operation, control, scheduling and management; rail electrification; signalling and communication; and environmental impacts such as vibration and noise. The editorial policy of the new journal will abide by the highest level of standards in research rigor, ethics, and academic freedom. All published articles in IJRT have undergone rigorous peer review, based on initial editor screening and anonymous refereeing by independent experts. There are no page charges and colour figures are included in the online edition free of charge.