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ÖÐͼ·ÖÀàºÅ£ºU270.1+6 ÎÄÏ×±êÖ¾Â룺A doi£º10.3969/j.issn.1006-0316.2022.11.007

ÎÄÕ±àºÅ£º1006-0316 (2022) 11-0050-06

Study on the Influence of Wheel-Rail Roughness on Wheel-Rail Noise

XU Tianxiao£¬XIAO Xinbiao£¬PENG Jian£¬LIU Moukai

( State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu 610031, China )

Abstract£ºThe wheel-rail roughness is a key factor that affects the wheel-rail sound source and the noise inside the subway. A wheel-rail rolling noise model was established based on finite element, boundary element and wheel-rail contact force model, and the influence of different wheel-rail roughness on wheel-rail noise source was analyzed. The following conclusions were drawn: the main energy of the 120 km/h wheel-rail noise is concentrated in the middle and high frequency bands, and there is a peak at the 800 Hz frequency band. Compared with before wheel lathing, the total wheel-rail noise after wheel lathing is 107.8 dB(A), a decrease of 12.1 dB(A). The wheel roughness mainly affects the middle and high frequency bands of the wheel-rail noise. The wheel-rail noise corresponding to different grades of rail roughness is between 106.9 and 117.9 dB(A), the rail roughness has an impact on the whole frequency band of the wheel-rail noise, and has a relatively large impact on the low frequency.

Key words£ºsubway£»finite element£»boundary element method£»wheel-rail roughness£»wheel-rail noise

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