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风屏障的突风效应对桥上列车走行性的影响

徐昕宇 李永乐 陈星宇 郑晓龙 廖海黎

徐昕宇, 李永乐, 陈星宇, 郑晓龙, 廖海黎. 风屏障的突风效应对桥上列车走行性的影响[J]. 西南交通大学学报, 2021, 56(5): 1050-1055, 1093. doi: 10.3969/j.issn.0258-2724.20191201
引用本文: 徐昕宇, 李永乐, 陈星宇, 郑晓龙, 廖海黎. 风屏障的突风效应对桥上列车走行性的影响[J]. 西南交通大学学报, 2021, 56(5): 1050-1055, 1093. doi: 10.3969/j.issn.0258-2724.20191201
XU Xinyu, LI Yongle, CHEN Xingyu, ZHENG Xiaolong, LIAO Haili. Impact of Sudden Change of Wind Loads on Running Performance of Vehicle on Bridge with Wind Barriers[J]. Journal of Southwest Jiaotong University, 2021, 56(5): 1050-1055, 1093. doi: 10.3969/j.issn.0258-2724.20191201
Citation: XU Xinyu, LI Yongle, CHEN Xingyu, ZHENG Xiaolong, LIAO Haili. Impact of Sudden Change of Wind Loads on Running Performance of Vehicle on Bridge with Wind Barriers[J]. Journal of Southwest Jiaotong University, 2021, 56(5): 1050-1055, 1093. doi: 10.3969/j.issn.0258-2724.20191201

风屏障的突风效应对桥上列车走行性的影响

doi: 10.3969/j.issn.0258-2724.20191201
基金项目: 国家重点研发计划(2017YFB1201204)
详细信息
    作者简介:

    徐昕宇(1990—),男,高级工程师,博士,研究方向为桥梁风工程及车桥耦合振动,E-mail:lsxxy90@126.com

  • 中图分类号: U448.13

Impact of Sudden Change of Wind Loads on Running Performance of Vehicle on Bridge with Wind Barriers

  • 摘要: 为研究列车进出风屏障段时所受突风效应的影响,以一高速铁路多跨简支梁桥为研究对象,通过风洞试验测试了风屏障在100.0%、43.5%和0透风率情况下车-桥系统的气动特性;基于哑元耦合法,建立了风-车-桥系统分析模型,开展了两种风屏障布置形式(通长和非通长)时风屏障透风率和列车车速对列车动力响应的影响分析. 研究结果表明:设置风屏障时桥上列车的气动特性存在较大差异,尤其列车气动阻力系数在风屏障透风率0比透风率100.0%时减少87%;当风屏障通长布置时,风屏障防风效果显著,随着透风率的减小,列车动力响应大幅减小,其中轮重减载率减小达53%;当风屏障非通长布置情况时,列车在进入和离开风屏障区段时,突风效应对列车的横向加速度和竖向加速度均影响显著,透风率越低,加速度响应变化越剧烈,但对于轮轴横向力和轮重减载率的影响有限;随着车速的提高,突风效应造成的加速度响应总体上增大,呈明显的非线性变化.

     

  • 图 1  桥梁有限元模型

    Figure 1.  Finite element model of bridge

    图 2  基于哑元耦合法的风-车-桥系统分析模型

    Figure 2.  Wind-vehicle-bridge system model based on DBC (dummy body coupling) method

    图 3  桥上风屏障分布

    Figure 3.  Distributions of wind barriers on the bridge

    图 4  离散风场模拟

    Figure 4.  Wind velocity fields at discrete points

    图 5  通长布置风屏障对车辆动力响应影响

    Figure 5.  Influences of continuous wind barriers on dynamic responses of vehicle

    图 6  非通长布置风屏障对车辆动力响应影响

    Figure 6.  Influences of non-continuous wind barriers on dynamic responses of vehicle

    表  1  列车气动力系数

    Table  1.   Aerodynamic coefficients of vehicle

    透风率/%阻力系数 CD升力系数 CL扭矩系数 CM
    100.01.7100.739−0.098
    43.51.0820.554−0.089
    00.230−0.0240.017
    下载: 导出CSV

    表  2  通长布置风屏障不同透风率下列车的动力响应

    Table  2.   Dynamic responses of vehicle at different porosities of continuous wind barriers

    风屏障透风率/% 横向加速度/
    (m•s−2
    竖向加速度/
    (m•s−2
    轮轴横向力/kN 轮重减载率 脱轨系数 横向 Sperling
    指标
    竖向 Sperling
    指标
    100.0 0.939 7 0.881 2 23.46 0.585 8 0.203 0 2.300 5 1.957 3
    43.5 0.710 8 0.817 4 17.42 0.434 4 0.140 4 2.199 9 1.887 2
    0 0.673 6 0.742 4 13.29 0.275 5 0.104 5 2.150 7 1.871 0
    下载: 导出CSV

    表  3  非通长布置风屏障不同透风率下列车的动力响应

    Table  3.   Dynamic responses of vehicle at different porosities of non-continuous wind barriers

    中间段风屏障透风率/% 横向加速度/
    (m•s−2
    竖向加速度/
    (m•s−2
    轮轴横向力/kN 轮重减载率 脱轨系数 横向Sperling
    指标
    竖向Sperling
    指标
    100.0 0.9397 0.8812 23.46 0.585 8 0.203 0 2.300 5 1.957 3
    43.5 0.9135 0.8832 23.02 0.585 8 0.198 8 2.285 1 1.933 7
    0 1.0500 0.8511 22.60 0.585 8 0.194 5 2.292 5 1.973 6
    下载: 导出CSV

    表  4  不同车速下列车的动力响应

    Table  4.   Dynamic responses of vehicle at different operation speeds

    透风率/% 车速/
    (km•h−1
    横向加速度/
    (m•s−2
    竖向加速度/
    (m•s−2
    轮轴横
    向力/kN
    轮重减载率 脱轨系数 横向 Sperling
    指标
    竖向 Sperling
    指标
    43.5 150 0.830 8 0.790 0 20.30 0.501 1 0.161 3 2.081 9 1.928 7
    175 0.934 6 0.807 7 21.68 0.525 0 0.168 7 2.172 3 1.876 6
    200 0.913 5 0.883 2 23.02 0.585 8 0.198 8 2.285 1 1.933 7
    225 0.952 0 0.740 6 22.13 0.586 6 0.182 0 2.372 3 2.022 6
    250 1.331 2 0.927 4 30.72 0.683 0 0.244 1 2.558 4 2.111 7
    0 150 1.229 8 0.823 7 23.43 0.554 9 0.188 9 2.077 3 1.963 9
    175 1.543 0 0.984 8 20.98 0.532 6 0.172 6 2.206 7 1.933 0
    200 1.050 0 0.851 1 22.60 0.585 8 0.194 5 2.292 5 1.973 6
    225 1.127 2 0.894 7 26.04 0.591 4 0.198 9 2.387 3 2.016 9
    250 1.435 9 1.036 2 30.48 0.683 0 0.247 0 2.592 4 2.210 0
    下载: 导出CSV

    表  5  列车气动力系数变化量对比

    Table  5.   Comparison on aerodynamic coefficient variations of vehicle

    透风率/%δDδL
    43.50.6280.185
    01.4800.763
    下载: 导出CSV
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出版历程
  • 收稿日期:  2019-12-28
  • 修回日期:  2020-03-12
  • 网络出版日期:  2020-03-20
  • 刊出日期:  2021-10-15

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