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带输送机边主梁涡振性能及抑振措施试验研究

李春光 毛禹 颜虎斌 梁爱鸿 韩艳

李春光, 毛禹, 颜虎斌, 梁爱鸿, 韩艳. 带输送机边主梁涡振性能及抑振措施试验研究[J]. 西南交通大学学报, 2022, 57(4): 886-893. doi: 10.3969/j.issn.0258-2724.20210224
引用本文: 李春光, 毛禹, 颜虎斌, 梁爱鸿, 韩艳. 带输送机边主梁涡振性能及抑振措施试验研究[J]. 西南交通大学学报, 2022, 57(4): 886-893. doi: 10.3969/j.issn.0258-2724.20210224
LI Chunguang, MAO Yu, YAN Hubin, LIANG Aihong, HAN Yan. Experimental Study on Vortex-Induced Vibration Performance and Countermeasures for Side Girder Beam with Conveyer[J]. Journal of Southwest Jiaotong University, 2022, 57(4): 886-893. doi: 10.3969/j.issn.0258-2724.20210224
Citation: LI Chunguang, MAO Yu, YAN Hubin, LIANG Aihong, HAN Yan. Experimental Study on Vortex-Induced Vibration Performance and Countermeasures for Side Girder Beam with Conveyer[J]. Journal of Southwest Jiaotong University, 2022, 57(4): 886-893. doi: 10.3969/j.issn.0258-2724.20210224

带输送机边主梁涡振性能及抑振措施试验研究

doi: 10.3969/j.issn.0258-2724.20210224
基金项目: 国家自然科学基金 (51978087,51822803);湖南省自然科学基金 (2020JJ14607)
详细信息
    作者简介:

    李春光(1980—),男,副教授,博士,研究方向为桥梁风工程,E-mail:mrlcg@126.com

  • 中图分类号: U448.27

Experimental Study on Vortex-Induced Vibration Performance and Countermeasures for Side Girder Beam with Conveyer

  • 摘要:

    桥面输送机改变了边主梁的气动外形,为研究其涡振性能及抑振措施,开展了1.00∶20.00刚性节段模型自由悬挂风洞试验. 首先,研究了带输送机边主梁断面涡振性能,并测试了结构阻尼比对其的影响;其次,对比了有、无输送带边主梁的涡振性能;最后,采用风嘴、梁底稳定板、水平隔流板等气动措施对主梁断面涡振性能进行了优化研究. 结果表明:带输送机边主梁在规范要求的0°、±3° 风攻角下的涡振性能均较差,最大超出规范限值286%;桥面输送机降低了主梁的涡振稳定性,涡振响应峰值提高了44%;梁底安装稳定板有利于改善主梁的涡振性能,并且与梁底同高的稳定板制振效果随其数量的增加而更优,安装3道1.5 m下稳定板对主梁涡振抑制效果达93%;伸出梁底0.5 m的2.0 m高中央稳定板能完全抑制主梁涡振;风嘴对主梁的涡振性能影响较弱,但在一定范围内具有最优角度取值;梁底单独布置水平隔流板,涡振响应峰值降低17%;优化主梁截面采用风嘴 + 风嘴水平分流板 + 1 m宽水平隔流板,主梁涡振响应峰值降低92%,且远低于规范限值.

     

  • 图 1  桥型布置(单位:cm)

    Figure 1.  Bridge layout (unit:cm)

    图 2  风洞节段模型试验

    Figure 2.  Wind tunnel test of section model

    图 3  原断面涡振性能

    Figure 3.  Vortex-induced vibration performance of original section

    图 4  阻尼比对主梁涡振响应的影响

    Figure 4.  Influence of damping ratio on vortex-induced vibration performance of main girder

    图 5  输送机对主梁涡振响应的影响

    Figure 5.  Influence of conveyer on vortex-induced vibration performance of main girder

    图 6  主梁风嘴布置

    Figure 6.  Layout of air nozzles on main girder

    图 7  风嘴角度对主梁涡振响应的影响

    Figure 7.  Influence of air nozzle angle onvortex-induced vibration performance of main girder

    图 8  稳定板布置

    Figure 8.  Layout of stabilizing plates

    图 9  梁底稳定板对主梁涡振响应的影响

    Figure 9.  Influence of stabilizing plates onvortex-induced vibration performance of main girder

    图 10  水平隔流板布置

    Figure 10.  Layout of the horizontal flow-isolating

    图 11  水平隔流板对主梁涡振响应的影响

    Figure 11.  Influence of horizontal baffles onvortex-induced vibration performance of main girder

    图 12  组合措施布置

    Figure 12.  Layout of combined countermeasure

    图 13  组合措施对主梁涡振响应的影响

    Figure 13.  Influence of combined countermeasure on vortex-induced vibration performance

    表  1  模型与实桥参数

    Table  1.   Parameters of model and prototype

    项目 长度/m 宽度/m 单位质量/
    (kg•m−1
    单位质量惯性矩/
    (kg•m2•m−1
    竖向
    频率/Hz
    扭转
    频率/Hz
    风速比 竖向阻尼比/% 扭转阻尼比/%
    实桥 30.40 12.12 5976.00 136055.00 0.539 0.857
    模型 1.52 0.61 14.94 0.85 5.643 8.655 0.25 0.28
    缩尺比 1.00∶20.00 1.00∶20.00 1.00∶400.00 1.00∶160 000.00 1.00∶10.46 1.00∶10.09 1.00∶1.91
    下载: 导出CSV

    表  2  气动措施优化工况

    Table  2.   Aerodynamic optimization measures

    工况措施状态
    1原设计断面
    2风嘴45°
    360°
    478°
    590°
    6下稳定板1 道 1.5 m下稳定板
    72 道 1.5 m下稳定板
    83 道 1.5 m下稳定板
    91 道 2.0 m下稳定板
    10水平
    隔流板
    0.6 m
    111.0 m
    12组合
    措施
    工况 4 + 工况 10 + 0.3 m 风嘴水平分流板
    13工况 4 + 工况 11 + 0.3 m 风嘴水平分流板
    下载: 导出CSV
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出版历程
  • 收稿日期:  2021-03-29
  • 修回日期:  2021-06-29
  • 刊出日期:  2021-07-12

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