列车气动噪声源噪声贡献度研究
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1.中车南京浦镇车辆有限公司 技术中心;2.同济大学 铁道与城市轨道交通研究院

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中图分类号:

U270.16

基金项目:

国家自然科学基金项目51805373;中央高校基本科研业务费专项资金项目 22120210558


Research on Noise Contribution Radiated from Aerodynamic Noise Source of train
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Techology Center of CRRC Nanjing Puzhen Co.Ltd

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    摘要:

    摘要:建立某型列车气动噪声计算模型,基于标准湍流模型和大涡模拟(LES)计算车外瞬态流场,用FW-H方程预测了列车远场气动噪声。分别计算了列车整体、车体、受电弓、转向架为噪声源时对外辐射噪声的总声压级和贡献度,并对不同噪声源产生的气动噪声频谱特性进行了分析。计算结果表明:受电弓滑板处具有最大的总声压级,其次在车头和头、尾车转向架处较大;车体和转向架对列车远场噪声贡献度较大,而受电弓对其附近区域噪声贡献度大于远场;车体和转向架噪声主频在400Hz~1250 Hz,而受电弓主频出现在500Hz,且低频噪声幅值很小。列车整体对远场的辐射噪声,与利用车体、受电弓和转向架为噪声源得到的远场噪声叠加相吻合,验证了计算的准确性,对噪声的计算研究有一定的参考价值。

    Abstract:

    ABSTRACT: A certain type of train aerodynamic noise calculation model is established, based on the standard turbulence model and large eddy simulation (LES) to calculate the transient flow field outside the train, using FW-H equation to predict the far-field aerodynamic noise of the train. The total sound pressure level and contribution degree of external radiated noise when the train, car body, pantograph, and bogie are the noise sources are respectively calculated, and the aerodynamic noise spectrum characteristics generated by different noise sources are analyzed. The calculation results show that: the pantograph sliding plate has the largest total sound pressure level, followed by the front and the front and tail car bogies; the car body and the bogie have a greater contribution to the far-field noise of the train, while the pantograph The noise contribution of the nearby area is greater than that of the far field; the main frequency of car body and bogie noise is 400Hz~1250 Hz, while the main frequency of pantograph is 500Hz, and the amplitude of low-frequency noise is very small. The far-field radiation noise of the train as a whole is consistent with the far-field noise superposition obtained by using the car body, pantograph and bogie as noise sources, which verifies the accuracy of the calculation, and it has certain reference value for the calculation and research of noise.

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引用本文

朱程,金鑫,贾小平,等. 列车气动噪声源噪声贡献度研究[J]. 科学技术与工程, , ():

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  • 收稿日期:2021-12-09
  • 最后修改日期:2022-04-18
  • 录用日期:2022-04-30
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