Effects of wheel condition on vibration source intensity of subway trains and their evaluation method

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Journal of Vibration and Shock ›› 2024, Vol. 43 ›› Issue (17) : 184-190.

MAO Wei

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Abstract

Wheel condition is a crucial factor contributing to the uncertainty of subway vibration sources. Continuous vibration monitoring was conducted in different sections of the subway tunnel throughout the day, and the distribution characteristics of vibration source intensity under different wheel conditions were analyzed based on the measured data. The impact of the number of train passes on the evaluation results of vibration source intensity was discussed. The results indicate that the maximum Z vibration level exhibits periodic fluctuations with the operational train count as the window length. Due to differences in wheel conditions, the fluctuation amplitude of the maximum Z vibration level can reach 20.3 dB, exceeding the effectiveness of advanced damping and the correction value range specified by guidelines. The operational train count is recommended in calculating the vibration source owing to the periodic fluctuations characteristics induced by wheel condition.

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vibration source / wheel condition / discrete characteristics / evaluation methods / field measurement

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MAO Wei. Effects of wheel condition on vibration source intensity of subway trains and their evaluation method[J]. Journal of Vibration and Shock, 2024, 43(17): 184-190

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