Experimental study on piston- and sloshing- mode moonpool resonances

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• 作者：Seung-Ho Yang ; Sang-Beom Lee ; Jung-Ho Park…
• 关键词：Piston ; mode ; Sloshing ; mode ; Moonpool resonance ; Cofferdam
• 刊名：Journal of Marine Science and Technology
• 出版年：2016
• 出版时间：December 2016
• 年：2016
• 卷：21
• 期：4
• 页码：715-728
• 全文大小：3,204 KB
• 刊物类别：Engineering
• 刊物主题：Automotive and Aerospace Engineering and Traffic
  Engineering Fluid Dynamics
  Engineering Design
  Offshore Engineering
  Mechanical Engineering
  
• 出版者：Springer Japan
• ISSN：1437-8213
• 卷排序：21

文摘

An experimental study was performed on the piston- and sloshing-mode moonpool resonances of offshore structures. Two different geometries were considered to investigate the flow characteristics in a plain moonpool and a moonpool with a cofferdam. To examine the efficiency of a cofferdam for reducing the flow in a moonpool, three cofferdam geometries were tested. The plain moonpool presented violent flows as a result of the piston- and sloshing-mode resonances. However, the moonpool with the cofferdam introduced violent sloshing waves instead of the ascent and descent of the water column in the piston-mode moonpool resonance. Among three different cofferdam geometries, the model with a right triangle facing to the left on the top of the cofferdam was most effective in reducing the flow in the moonpool when compared with the other models.