基于主动喷射技术的高速列车受电弓区域内部降噪方法

IF 1.1 4区工程技术 Q4 MECHANICS

Journal of Applied Fluid Mechanics Pub Date : 2024-07-01 DOI:10.47176/jafm.17.7.2472

D. Liu, X. Miao, Z. Zhang, J. Yang, T. Yuan, R. Song

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引用次数: 0

摘要

受电弓区域造成的内部噪声大于其他区域造成的噪声，而且随着高速列车速度的提高，尤其是时速超过 350 公里时，受电弓区域的影响变得更加显著。本研究提出了一种针对受电弓空腔的主动喷射方法，从源头上控制噪音。首先，通过联合采用大涡模拟-统计能量分析方法，建立了受电弓车厢内部噪声的预测模型。然后，通过数值模拟确定了不同速度（300、350、400 和 450 公里/小时）下的外部噪声源和内部声压级。最后，采用不同速度（97.2、111.1、125 和 140 米/秒）的主动射流来分析车内噪声的降低情况。结果表明，主动喷射法降低了水平面内声腔的平均整体声压级。当列车速度达到 450 公里/小时时，无论是站姿还是坐姿，车内噪声在水平面上的最佳降低幅度约为 7.5 分贝。所提出的方法可有效降低受电弓区域的内部噪声。

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Interior Noise Reduction Method of Pantograph Areas for High-speed Trains Based on Active Jet Technology

The interior noise caused by the pantograph area is greater than that caused by other areas, and the impact of this pantograph area becomes more significant as the speed of high-speed trains increases, especially above 350 km/h. This study proposes an active jet method for pantograph cavities to control noise at the source. First, a predictive model for the interior noise of pantograph carriages was established by jointly adopting large eddy simulation–statistical energy analysis methods. Then, numerical simulations were conducted to determine the external noise sources and interior sound pressure level at different speeds (300, 350, 400, and 450 km/h). Finally, active jets at different speeds (97.2, 111.1, 125, and 140 m/s) were used to analyze the reduction in interior noise. Results showed that the active jet method decreased the average overall sound pressure level of the acoustic cavity in the horizontal plane. When the train speed reached 450 km/h, the optimal reduction in interior noise was approximately 7.5 dB in the horizontal plane for both the standing and sitting postures. The proposed method can efficiently reduce interior noise in the pantograph area.

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来源期刊

Journal of Applied Fluid Mechanics THERMODYNAMICS-MECHANICS

CiteScore

2.00

自引率

20.00%

发文量

138

审稿时长

>12 weeks

期刊介绍： The Journal of Applied Fluid Mechanics (JAFM) is an international, peer-reviewed journal which covers a wide range of theoretical, numerical and experimental aspects in fluid mechanics. The emphasis is on the applications in different engineering fields rather than on pure mathematical or physical aspects in fluid mechanics. Although many high quality journals pertaining to different aspects of fluid mechanics presently exist, research in the field is rapidly escalating. The motivation for this new fluid mechanics journal is driven by the following points: (1) there is a need to have an e-journal accessible to all fluid mechanics researchers, (2) scientists from third- world countries need a venue that does not incur publication costs, (3) quality papers deserve rapid and fast publication through an efficient peer review process, and (4) an outlet is needed for rapid dissemination of fluid mechanics conferences held in Asian countries. Pertaining to this latter point, there presently exist some excellent conferences devoted to the promotion of fluid mechanics in the region such as the Asian Congress of Fluid Mechanics which began in 1980 and nominally takes place in one of the Asian countries every two years. We hope that the proposed journal provides and additional impetus for promoting applied fluids research and associated activities in this continent. The journal is under the umbrella of the Physics Society of Iran with the collaboration of Isfahan University of Technology (IUT) .