不同高宽比并列双幅箱梁气动升力的干扰效应
作者:
作者单位:

作者简介:

通讯作者:

中图分类号:

U441.2;TH138

基金项目:

国家自然科学基金资助项目(52078313,52008273);河北省自然科学基金资助项目(E2020210083);河北省高等学校科学技术研究资助项目(ZD2019118);省部共建交通工程结构力学行为与系统安全国家重点实验室自主课题资助项目(ZZ2020?14)


Interference Effect on Aerodynamic Lift of Twin Parallel Box Girders with Different Aspect Ratios
Author:
Affiliation:

Fund Project:

  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • |
  • 资源附件
  • |
  • 文章评论
    摘要:

    为了给实际工程中并列双幅变截面箱梁的气动升力取值提供参考,针对不同高宽比的双幅箱梁,通过刚性模型测压风洞试验,测试了多个不同风攻角和间距时双幅箱梁的升力系数,并与单幅箱梁的升力系数进行了对比分析。引入干扰因子对下游箱梁的干扰效应进行定量表示。研究结果表明:与单幅箱梁相比,上游箱梁的气动升力变化不大,下游箱梁的气动升力变化显著;在大多数正向风攻角下,下游箱梁气动升力的干扰效应表现为明显的减小效应;在负向风攻角下,气动干扰使下游箱梁承受向下的升力,升力值随着风攻角的增大而增大,随着间距和箱梁高宽比的减小而增大。

    Abstract:

    In order to provide a reference value for aerodynamic lift acting on twin parallel box girders in actual engineering projects, twin parallel box girders with different aspect ratios are selected. The lift coefficients under different wind attack angles and spacings are measured through pressure measurement wind tunnel test of rigid model, which are compared with those of single box girder. The interference effect of downstream box girder is expressed quantitatively by introducing interference factors. The results show that the interference effect on the aerodynamic lift is slight for upstream box girder and obvious for downstream box girder. Under most positive wind attack angles, the interference effect on the aerodynamic lift for the downstream box girder is mainly manifested as a reducing effect. Under negative wind attack angles, the lift on the downstream box girder is downward. The downward lift increases with increasing wind attack angles and decreasing spacing and aspect ratio.

    参考文献
    相似文献
    引证文献
引用本文
分享
文章指标
  • 点击次数:
  • 下载次数:
  • HTML阅读次数:
  • 引用次数:
历史
  • 收稿日期:2021-02-21
  • 最后修改日期:2022-04-18
  • 录用日期:
  • 在线发布日期: 2023-03-09
  • 出版日期:
您是第位访问者
振动、测试与诊断 ® 2024 版权所有
技术支持:北京勤云科技发展有限公司