Study on Sound and Vibration Characteristics of Wheel on Urban Rail Transit
Noise disturbance is one of the main environmental pollution problems of overhead lines for urban rail transit.Taking the wheel of Chongqing Rail Transit Line 1 as a research object,ANSYS was applied to analyze the modal and harmonious response of the wheel in this paper.Then,LMS virtual.lab was used to analyze the relevant acoustic and vibration characteristics at the peak of wheel admittance and carry out visualization research.The analysis results showed that the tread and spoke vibrated greatly in the high frequency range above 1,000 Hz,and with the increase of frequency,the tread and spoke vibrate more significantly.In the high frequency range above 2,000 Hz,the radial mode had a greater impact on wheel-rail noise.In the(r,5)mode,the acoustic power reached the maximum value of 107.75 dB.The directivity of wheel sound radiation had a certain symmetry.With the increase of frequency,the number of sidelobes of directedness increased first and then decreased,and the noise pressure level of the wheel facing outside the track line was greater than that facing inside.The wheel was divided into 5 parts:flange,rim,wheel tread,spoke plate and hub for acoustic contribution analysis.In general,spoke plate contributed the most to wheel noise,and specific noise reduction measures should be taken.
Urban rail transitwheel-rail noisenoise characteristicsfinite element method
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