Study on reduction of the wind load and the aerodynamics vibration of the bridge girder by the bridge appendages

桥梁附体减振桥梁风荷载和气动振动的研究

• 批准号: 24760368
• 负责人: NAKATO Seiji
• 金额: $ 2.91万
• 依托单位: Kanto Gakuin University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Young Scientists (B)
• 财政年份: 2012
• 资助国家: 日本
• 起止时间: 2012-04-01 至 2014-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-24760368/
• 关键词: 相関長さ; 矩形断面柱; 変動揚力係数; ストローハル成分; コヒーレンス; 変動風速; 付加物; 変動揚力; パンチングメタル; 渦励振; 抗力係数

Study on reduction of the wind loads and the aerodynamics vibrations of bridge girder by appendages with spanwise inhomogeneous section was conducted using wind tunnel. The appendages with spanwise inhomogeneous section were effective on reduction of fluctuating lift acting on the models with some side ratio. For the models with other side ratio, openings with spanwise inhomogeneous section were effective.Spectral analysis of the hot-wire data was conducted for evaluation of spanwise correlation length. Coherence values at vortex shedding frequency were plotted as function of distance. It could be represented well by Gaussian function, and correlation length was derived as integral scale. Evaluation method of windward correlation length was also proposed with employing auto-correlation function.

利用风洞进行了展向非均匀截面附属物降低桥梁风荷载和气动振动的研究。翼展方向不均匀截面的附体对于减小作用在一定边比模型上的脉动升力是有效的。对于具有其他边比的模型，翼展方向不均匀截面的开孔是有效的。对热线数据进行频谱分析，以评估翼展方向相关长度。涡旋脱落频率的相干值被绘制为距离的函数。它可以用高斯函数很好地表示，并导出相关长度作为积分尺度。还提出了利用自相关函数的迎风相关长度评估方法。

项目成果

正方形断面柱の後流および発生する空力音の迎角による変化

方形横截面柱尾流的变化以及根据攻角产生的气动噪声

• 发表时间: 2013
• 作者: 藤森弘晃;荒木功平;後藤聡;北爪貴史;中藤誠二,金子洋樹
• 通讯作者: 中藤誠二,金子洋樹

正方形柱に作用する変動空気力の開口による抑制手法

方柱上脉动气动力的孔径抑制方法

• 发表时间: 2014
• 作者: Mon;E. E.;S. Hamamoto;T. Saito;K. Kawamoto;and T. Komatsu;佐竹紳也;Naka Angelica;有原萌恵，濱本昌一郎，川本健，小松登志子;佐竹，谷口，林ほか;林，谷口，佐竹ほか;田村成仁・高井敦史・乾 徹・栗原太志・勝見 武・荒木 進・嘉門雅史;佐野和文・高井敦史・乾 徹・勝見 武・最上裕生・吉村 貢・荒木 進・嘉門雅史;小川翔太郎・乾 徹・高井敦史・勝見 武;松尾大介,肥後陽介,音田慎一郎,三村衛;松尾大介,肥後陽介,音田慎一郎,三村衛;中藤誠二
• 通讯作者: 中藤誠二