| CUI Cheng,ZHANG Ningchuan,KANG Haigui,YU Yuxiu. 2013. An experimental and numerical study of the freak wave speed. Acta Oceanologica Sinica, 32(5):51－56 |
| An experimental and numerical study of the freak wave speed |
| An experimental and numerical study of the freak wave speed |
| Received:November 03, 2011 Revised:June 12, 2012 |
| DOI：10.1007/s13131-013-0313-5 |
| Key words:freak wave speed regression analysis Stokes wave |
| 中文关键词: freak wave speed regression analysis Stokes wave |
| 基金项目:The Science Fund for Innovative Research Groups under contract No. 50921001. |
| Author Name | Affiliation | E-mail | | CUI Cheng | State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116023, China | chengcui1984@163.com | | ZHANG Ningchuan | State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116023, China | | | KANG Haigui | State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116023, China | | | YU Yuxiu | State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116023, China | |
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| Abstract: |
| The propagation speed is one of the most important characteristics for describing freak waves. The research of freak wave speed is not only helpful for understanding the generation mechanism and evolution process of freak waves, but also applicable to the prediction. A stable and accurate method is proposed for the calculation of the freak wave speed, in which physical model tests are carried out to measure the motion of the largest wave crest along the wave tank. The linear regression relationship between the spatial position of the largest wave crest and instantaneous moment is established to calculate the speed of totally 248 cases of experimental freak waves and 312 supplementary cases of numerical freak waves. Based on the calculate results, a semitheoretical and semiempirical formula is proposed by using a regression analysis method to predict the speed of the freak wave, and the nonlinear characteristic of the freak wave speed is also investigated. |
| 中文摘要: |
| The propagation speed is one of the most important characteristics for describing freak waves. The research of freak wave speed is not only helpful for understanding the generation mechanism and evolution process of freak waves, but also applicable to the prediction. A stable and accurate method is proposed for the calculation of the freak wave speed, in which physical model tests are carried out to measure the motion of the largest wave crest along the wave tank. The linear regression relationship between the spatial position of the largest wave crest and instantaneous moment is established to calculate the speed of totally 248 cases of experimental freak waves and 312 supplementary cases of numerical freak waves. Based on the calculate results, a semitheoretical and semiempirical formula is proposed by using a regression analysis method to predict the speed of the freak wave, and the nonlinear characteristic of the freak wave speed is also investigated. |
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