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桥梁截面形式对轨道交通高架噪声的影响

顾民杰 励吾千 李奇

顾民杰, 励吾千, 李奇. 桥梁截面形式对轨道交通高架噪声的影响[J]. 西南交通大学学报, 2019, 54(4): 715-723. doi: 10.3969/j.issn.0258-2724.20180262
引用本文: 顾民杰, 励吾千, 李奇. 桥梁截面形式对轨道交通高架噪声的影响[J]. 西南交通大学学报, 2019, 54(4): 715-723. doi: 10.3969/j.issn.0258-2724.20180262
GU Minjie, LI Wuqian, LI Qi. Influence of Section Types on Noise from Elevated Rail Transit Lines[J]. Journal of Southwest Jiaotong University, 2019, 54(4): 715-723. doi: 10.3969/j.issn.0258-2724.20180262
Citation: GU Minjie, LI Wuqian, LI Qi. Influence of Section Types on Noise from Elevated Rail Transit Lines[J]. Journal of Southwest Jiaotong University, 2019, 54(4): 715-723. doi: 10.3969/j.issn.0258-2724.20180262

桥梁截面形式对轨道交通高架噪声的影响

doi: 10.3969/j.issn.0258-2724.20180262
基金项目: 上海市自然科学基金资助项目(15ZR1442800)
详细信息
    作者简介:

    顾民杰(1973—),男,教授级高工,研究方向为轨道交通桥梁新结构. E-mail:guminjie@smedi.com

  • 中图分类号: U233;TB53

Influence of Section Types on Noise from Elevated Rail Transit Lines

  • 摘要: 城市轨道交通高架一般采用预应力混凝土简支梁,其截面形式不但直接影响桥梁振动及其结构声辐射,还间接影响轮轨噪声的传播. 为给低噪声轨道交通的高架桥梁截面选型提供依据,本文采用功率流方法计算轮轨滚动激励引起的轨、桥空间平均振动均方速度,结合声有限元-无限元方法分析钢轨噪声和桥梁结构噪声的产生与传播,对比研究了某U型梁、单箱单室梁及双箱双室梁的振动及其声辐射的差异. 结果表明:桥梁截面形式对钢轨振动影响很小,但明显影响钢轨噪声辐射;截面形式对桥梁振动及结构噪声的影响均很大. 就钢轨噪声而言,U型梁相比箱形梁小1~3 dB(A);但在桥梁结构噪声方面,单箱单室梁较U型梁小2~10 dB(A),双箱双室梁较单箱单室梁可再减小2~6 dB(A).

     

  • 图 1  车轨桥系统模型示意

    注:L—单节车辆的长度;Nv—长度L范围内的扣件数;P(ω)—作用于主动轮处钢轨上的简谐力

    Figure 1.  Schematic model of vehicle-track-bridge system

    图 2  车-轨-桥系统二维有限元-无限元模型示意

    Figure 2.  Two-dimensional finite-infinite element model of vehicle-track-bridge system

    图 3  U型梁跨中截面布置

    Figure 3.  Mid-span section of the U-shaped girder

    图 4  U型梁计算场点网格

    Figure 4.  Mesh of acoustical field point for U-shaped girder

    图 5  单箱单室梁截面布置

    Figure 5.  Section of single-box single-cell box girder

    图 6  箱形梁声场计算场点网格

    Figure 6.  Mesh of acoustical field point for box girder

    图 7  U型梁和单箱单室梁的钢轨驱动点速度导纳

    Figure 7.  Driving point mobilities of rails on U-shaped and single-box single-cell box girders

    图 8  U型梁和单箱单室梁的钢轨和桥梁平均振速

    Figure 8.  Velocity spectra of rails and bridges for U-shaped and single-box single-cell box girders

    图 9  U型梁和单箱单室梁的A计权声压级差值云图对比(dB)

    Figure 9.  Contour map of difference in A-weighted noise levels between U-shaped and single-boxsingle-cell box girders (dB)

    图 10  香港西铁箱梁跨中截面布置

    Figure 10.  Mid-span section of box girder of West Rail Line in Hong Kong

    图 11  单箱单室梁与双箱双室梁的振动功率对比

    Figure 11.  Comparison of vibration power inputs of single-box single-cell and twin-box twin-cell box girders

    图 12  单箱单室梁和双箱双室梁的A计权声压分布云图对比(dB)

    Figure 12.  Contour map of difference in A-weighted noise levels between single-box single-cell and twin-box twin-cell box girders (dB)

    表  1  不同截面形式桥梁结构主要参数

    Table  1.   Main parameters of various bridge sections

    参数截面形式
    U型单箱单室双箱双室
    跨度/m303030
    双线桥梁跨中截面面积/m24.485.156.4
    左/右钢轨处道床板厚度/m0.25/0.250.25/0.460.30/0.30
    左/右钢轨距离腹板水平距离/m1.06/1.440.94/0.560.08/0.08
    顶板或护栏距离轨顶高度/m1.070.730.73
    下载: 导出CSV
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出版历程
  • 收稿日期:  2018-04-04
  • 修回日期:  2018-06-08
  • 网络出版日期:  2019-05-09
  • 刊出日期:  2019-08-01

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