摘要详情
5 / 2025-07-07 17:00:03
Active Jet Control Method for Vortex-Induced Loads on Rectangular Steel Cofferdams of Deep-Water Bridges
Vortex-Induced Vibration; Ultra-High Reynolds Number; Deep-Water Steel Cofferdam
摘要待审
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.
重要日期
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会议日期
08月15日
2025
至08月17日
2025
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08月08日 2025
初稿截稿日期
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08月08日 2025
报告提交截止日期
主办单位
兰州交通大学
同济大学
同济大学
承办单位
兰州交通大学土木工程学院
中国建筑第六工程局有限公司
中国建筑第六工程局有限公司
联系方式
历届会议
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2025年11月30日 中国 兰州市(Lanzhou)
第八届桥梁结构防震减灾与工程创新国际会议(ICEISMB 2025)
