Discrete Vortex Analysis on Suppression Countermeasures against Vortex-Induced Vibration of a Box Girder

• MATSUDA Ryohei

  Department of Structural Engineering at Technical Consulting Headquarters, Nichizotech. Inc.

• IZUNO Kazuyuki

  Department of Civil Engineering, Ritsumeikan University

• HATANAKA Akihide

  Department of Structural Engineering at Technical Consulting Headquarters, Nichizotech. Inc.

• KOBAYASHI Hiroshi

  Department of Civil Engineering, Ritsumeikan University

抄録

This paper focused on improving the aerodynamic characteristic of a box girder against vortex induced vibration. Discrete vortex method was used for the analysis. Two kinds of models were used for the analysis: one was a basic section without appendage, while the other was a modified section with an appendage attached only to the bottom plate. Vertical plate was employed as the appendage. The analysis results showed the plate with a certain height was effective to suppress heaving response, and large plate was unnecessary. The mechanism of suppression was as follows. Secondary vortices were formed on both the front and the rear side of the vertical plate as the girder section vibrates. These vortices produced decreasing separation angle and reattachment of the flow. The effective height of the vertical plate on suppression against vortex induced vibration could be decided to some extent from the analysis results of a fixed section.

収録刊行物

• Theoretical and Applied Mechanics Japan

  Theoretical and Applied Mechanics Japan 60 (0), 89-96, 2012

  日本学術会議 「機械工学委員会・土木工学・建築学委員会合同IUTAM分科会」

詳細情報

• CRID: 1390001205210618880
• NII論文ID: 130004463831
• DOI: 10.11345/nctam.60.89
• ISSN: 13494244
• ISSN: 13480693
• 本文言語コード: en
• データソース種別:
  • JaLC
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可