The Influence of Wheel-Rail Excitation on the Vibration Reduction Effect of Rubber Pad Floating Slab Track

被引：0
|
作者：
Li M. [1 ]
Wang W. [1 ]
Wu Z. [1 ]
Zhang S. [1 ]
Wu Z. [1 ]
Wei Z. [1 ]
机构：
[1] China Academy of Railway Sciences Corporation Limited, Urban Rail Transit Center, Beijing
来源：
Zhongguo Tiedao Kexue/China Railway Science | 2024年 / 45卷 / 02期
关键词：
Metro; Rubber pad floating slab track; Train-induced vibration; Vibration reduction effect; Wheel-rail excitation;
D O I：
10.3969/j.issn.1001-4632.2024.02.03
中图分类号：
学科分类号：
摘要：
In order to analyze the vibration reduction effect of rubber pad floating slab track under different wheelrail irregularity conditions, a comparative in-situ test was performed on two measuring sections including regular ballastless slab track and rubber pad floating slab track (RPFST) in the same straight section of a subway line. The net operating mileage of operating trains and wheels irregularities were synchronously investigated. The results show that when evaluating the vibration control performance of the vibration-damping track, in addition to the objective evaluation of the insertion loss or comparison loss, it is more critical is to analyse whether the vibration responses of the vibration-damping track section will exceed the vibration limit with the enhancement of wheel-rail excitation. The wheels of operating trains on the tested subway line exhibit obvious seventh-to-ninth order polygonal wear characteristics, and with the enhancement of wheel-rail excitation, the evaluation result of ΔVLZ, max gradually increases. The frequency division vibration reduction effect of RPFST is directly related to the excitation mechanisms of different frequency bands. At the natural frequency (63 Hz) of the fastener system, the increase in wheel-rail excitation leads to a greater increase of the tunnel wall vibration response of regular ballastless slab track; and the comparison loss at 63 Hz increases with the increase of net operating mileage. © 2024 Chinese Academy of Railway Sciences. All rights reserved.
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页码：30 / 40
页数：10
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