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首页> 外文期刊>Journal of aerospace engineering >Experimental Investigation on Vortex-Induced Vibration Mitigation of Stay Cables in Long-Span Bridges Equipped with Damped Crossties
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Experimental Investigation on Vortex-Induced Vibration Mitigation of Stay Cables in Long-Span Bridges Equipped with Damped Crossties

机译：长跨度桥梁涡旋涡旋振动减灾试验调查

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摘要

In this study, based on the high energy-dissipating capacity of viscoelastic dampers with shearing deformation, damped stay cable crossties were proposed to mitigate the vortex-induced vibration (VIV) of stay cables in long-span bridges. Viscoelastic dampers were installed at the connection points of cable crossties to dissipate the kinetic energy of stay cable vibration. Three stay cable models incorporating different numbers of damped crossties were set up in a wind tunnel. Experimental investigations on the control efficacy of the proposed damped stay cable crossties and their parametric influence on the mitigation of the VIV of stay cables were conducted. Numbers of the damped crossties connected with a target main stay cable at different locations were experimentally studied, when the first three modal VIV of three stay cable models were excited respectively. On the basis of the test results, the oscillation behavior of the VIV of the three stay cable models with and without control was ascertained. The experimental results indicated that the proposed damped stay cable crossties can significantly reduce the VIV of stay cables by increasing the stiffness and damping of the cables, and can enhance the modal frequency and the onset wind velocity of the VIV of stay cables due to the increased stiffness.
机译：在本研究中，基于具有剪切变形的粘弹性阻尼器的高能量消散能力，提出了阻尼停留电缆串扰，以减轻长跨度桥梁的涡旋诱导的涡旋振动（VIV）。粘弹性阻尼器安装在电缆曲折的连接点，以消散保持电缆振动的动能。在风洞中建立了包含不同数量的阻尼串联的三个住宿电缆型号。进行了对拟议的阻尼停留电缆串扰的控制效能的实验研究及其对缓慢电缆VIV的缓解的参数影响。通过分别激发了三个停留电缆模型的前三个模态VIV，在不同地点连接到不同地点的目标主座电缆连接的阻尼串联数量。在测试结果的基础上，确定了三个停留电缆模型VIV的振荡行为，并确定了没有控制的。实验结果表明，所提出的阻尼支架电缆曲折可以通过增加电缆的刚度和阻尼来显着减少保持电缆的VIV，并且可以提高由于增加而增强了住院电缆VIV的模态频率和开始风速刚性。

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  • 来源
    《Journal of aerospace engineering》 |2019年第5期|04019072.1-04019072.10|共10页
  • 作者

    Liu Min; Yang Wenhan; Chen Wenli; Xiao Huigang; Li Hui;

  • 作者单位

    Harbin Inst Technol Sch Civil Engn Key Lab Intelligent Disaster Mitigat & Control Ci Minist Ind & Informat Harbin 150001 Heilongjiang Peoples R China;

    Harbin Inst Technol Sch Civil Engn Key Lab Intelligent Disaster Mitigat & Control Ci Minist Ind & Informat Harbin 150001 Heilongjiang Peoples R China;

    Harbin Inst Technol Sch Civil Engn Key Lab Intelligent Disaster Mitigat & Control Ci Minist Ind & Informat Harbin 150001 Heilongjiang Peoples R China;

    Harbin Inst Technol Sch Civil Engn Key Lab Intelligent Disaster Mitigat & Control Ci Minist Ind & Informat Harbin 150001 Heilongjiang Peoples R China;

    Harbin Inst Technol Sch Civil Engn Key Lab Intelligent Disaster Mitigat & Control Ci Minist Ind & Informat Harbin 150001 Heilongjiang Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Vibration control; Stay cable; Damped cable crossties; Viscoelastic damper; Wind tunnel experiment; Vortex-induced vibration (VIV);

    机译：振动控制;保持电缆;阻尼电缆串联;粘弹性阻尼器;风洞实验;涡旋诱导的振动（VIV）;

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