高架线预制板减振轨道减振降噪效果测试与分析

刘锦辉1,刘鹏辉2,杨宜谦2,董振升2,周昌盛3,梁晓东2

振动与冲击 ›› 2022, Vol. 41 ›› Issue (15) : 43-53.

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振动与冲击 ›› 2022, Vol. 41 ›› Issue (15) : 43-53.
论文

高架线预制板减振轨道减振降噪效果测试与分析

  • 刘锦辉1,刘鹏辉2,杨宜谦2,董振升2,周昌盛3,梁晓东2
作者信息 +

Tests and analysis for vibration and noise reduction effect of track on metro visduct

  • LIU Jinhui1, LIU Penghui2, YANG Yiqian2, DONG Zhensheng2, ZHOU Changsheng3, LIANG Xiaodong2
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文章历史 +

摘要

通过对地铁高架桥上双层非线性减振扣件、减振垫浮置板、橡胶弹簧浮置板、钢弹簧浮置板轨道的现场振动和噪声测试,对高架线不同减振轨道结构的实际减振降噪效果进行分析和评价,分析了桥梁结构振动与辐射噪声之间的关系和不同减振轨道对减小桥梁结构辐射噪声的效果,可为今后的轨道减振设计提供借鉴,主要结论为:(1)相对于双层非线性减振扣件整体道床桥面,减振垫浮置板、橡胶弹簧、钢弹簧浮置板在1~80Hz范围内VLzmax的减振效果分别为10.2dB,10.6dB,11.8dB;在1~200Hz范围内VLza的减振效果分别为10.3dB,12.7dB,12.6dB。(2)高架线的噪声源频谱是宽频的,在中心频率80Hz和630Hz处噪声出现明显峰值;桥梁结构辐射噪声以12.5~250Hz低频噪声为主,桥梁结构辐射噪声可通过桥梁振动速度级或振动加速度级来计算。(3)高架线采用减振轨道可减小桥梁结构辐射噪声,相对于双层非线性减振扣件整体道床桥面,减振垫浮置板、橡胶弹簧、钢弹簧浮置板在12.5~250Hz范围内桥梁结构辐射噪声LAeq,Tp的降噪效果分别为7.6dBA,20.9dBA,17.1dBA。
关键词:高架桥;减振效果;桥梁结构辐射噪声

Abstract

Through the on-site vibration test of the double-layer non-linear damping fasteners, damping pad floating plates, rubber spring floating plates, and steel spring floating plates on the prefabricated slab track on the subway viaduct, the actual vibration and noise reduction effect of different vibration damping track structures on the elevated line is analysed and evaluated, the relationship between bridge structure vibration and noise is analyzed, and the effect of different vibration reduction tracks on the reduction of bridge structure noise is studied, which can provide reference for future track vibration reduction design. The results show that: (1) Relative to the double-layer non-linear damping fasteners track bed, for VLzmax of 1~80Hz on the bridge deck, the vibration damping effect of the double-layer non-linear damping fasteners, damping pad floating plates, rubber spring floating plates, and steel spring floating plates are 10.2dB, 10.6dB, 11.8dB respectively; for VLza of 1~200Hz, the vibration damping effects of the double-layer non-linear damping fasteners, damping pad floating plates, rubber spring floating plates, and steel spring floating plates are 10.3dB, 12.7dB and 12.6dB respectively. (2) The noise source spectrum of elevated lines is broadband, with obvious peaks at the center frequency of 80Hz and 630Hz; bridge structure noise is mainly low-frequency noise of 12.5~250Hz, and bridge structure noise can be calculated by bridge vibration speed level or vibration acceleration level . (3) Damping track adopted on the viaduct bridge can reduce the influence of bridge structure noise. Relative to the double-layer non-linear damping fasteners track bed, for LAeq,Tp of 12.5~250Hz, noise reduction effect of radiated noise from bridge structure are 7.6dBA,20.9dBA,17.1dBA respectively.
Key words: viaduct bridge; damping effect; radiated noise from bridge structure

关键词

高架桥 / 减振效果 / 桥梁结构辐射噪声

Key words

viaduct bridge / damping effect / radiated noise from bridge structure

引用本文

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刘锦辉1,刘鹏辉2,杨宜谦2,董振升2,周昌盛3,梁晓东2. 高架线预制板减振轨道减振降噪效果测试与分析[J]. 振动与冲击, 2022, 41(15): 43-53
LIU Jinhui1, LIU Penghui2, YANG Yiqian2, DONG Zhensheng2, ZHOU Changsheng3, LIANG Xiaodong2. Tests and analysis for vibration and noise reduction effect of track on metro visduct[J]. Journal of Vibration and Shock, 2022, 41(15): 43-53

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