Study on the Limiting Value of the Rail Decay Rate Based on Interior Noise

doi:10.3901/JME.2020.22.167

Abstract

Abstract: Rail decay rate is an important indicator to reflect the dynamic properties of the rail, which determines the effective radiating length of the rail, and has an effect on wheel-rail noise and interior noise. There are many types of rail track in Chinese metro lines whose decay rates are significantly different. China has no relevant standards for rail decay rate at present, and the existing international standard cannot correspond with the Chinese railway noise standard. So, researching the relationship between the interior noise and rail decay rate is significant in controlling the rail decay rate based on interior noise limit. Rail vibration prediction model, which is verified by the field test results, is established to analyze the effect of the fastener parameters on rail decay rate. The wheel/rail noise simulation model is established based on the rail decay rate according to the FEM-BEM and the relationship between the decay rate and wheel/rail noise. Then the transfer relationship between wheel/rail noise and interior noise is obtained according to the field test. Simulation combined with field test method is used in this research to establish the correspondence between the track attenuation rate and the interior noise, in which the wheel/rail noise plays a role of a bridge. Next, the decay rate limit based on interior noise is quantified according to the interior noise. Finally, fastener parameters according to the decay rate character is optimized. The related research results provide a reference on rail decay rate control based on interior noise and fastener parameters optimization.

Key words: rail decay rate, wheel-rail noise, interior noise, sound limits, fastener system

CLC Number:

U211
TB535

LIU Xiaolong, HAN Jian, XU Hanwen, XIAO Xinbiao, ZHU Leiwei, WEN Zefeng. Study on the Limiting Value of the Rail Decay Rate Based on Interior Noise[J]. Journal of Mechanical Engineering, 2020, 56(22): 167-175.

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