Active Jet Control Method for Vortex-Induced Loads on Rectangular Steel Cofferdams of Deep-Water Bridges
编号:27 访问权限:仅限参会人 更新:2025-07-29 15:12:50 浏览:41次 口头报告

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摘要
Vortex-induced vibration (VIV) can compromise the safety and precision of segment construction for double-walled steel cofferdams, so it is crucial to explore methods to suppress VIV in deep-water bridge cofferdams. This study focuses on the common rectangular cross-section of cofferdams and proposes adding an active jet device to suppress VIV. A two-dimensional simplified model of the double-walled steel cofferdam was established using CFD software. By adjusting key parameters such as the jet exit position and jet momentum coefficient, this study investigates the suppressive effect of the active jet device on the flow-induced load around the steel cofferdam. Results show that the RNG k-ε model aligns well with experimental values under ultra-high Reynolds numbers. A backward jet with a jet momentum coefficient of 0.36 offers the best suppression of lateral force. Forward jets can effectively reduce the drag force on the double-walled steel cofferdam but may cause vortex shedding to deviate from the center, increasing the lateral force. Using both forward and backward jet control measures simultaneously achieves drag reduction similar to forward jet control alone but weakens the backward jet's suppressive effect on the lateral force.
 
关键词
Vortex-Induced Vibration; Ultra-High Reynolds Number; Deep-Water Steel Cofferdam
报告人
鲁子敬
研究生 长安大学

稿件作者
鲁子敬 长安大学
牛艳伟 长安大学
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重要日期
  • 会议日期

    08月15日

    2025

    08月17日

    2025

  • 08月08日 2025

    初稿截稿日期

  • 08月16日 2025

    报告提交截止日期

  • 08月17日 2025

    注册截止日期

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