Research on the Water Ridge and Slamming Characteristics of a Semisubmersible Platform under Towing Conditions
During the towing of semisubmersible platforms, waves impact and superpose in front of the platform to form a ridge shaped “water ridge”, which protrudes near the platform and produces a large slamming pressure. The water ridges occur frequently in the towing conditions of semisubmersible platforms....
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-01-01
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| Series: | Journal of Marine Science and Engineering |
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| Online Access: | https://www.mdpi.com/2077-1312/10/1/116 |
| _version_ | 1797492887988994048 |
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| author | Fali Huo Changdong Wei Chenyang Zhu Zhaojun Yuan Sheng Xu |
| author_facet | Fali Huo Changdong Wei Chenyang Zhu Zhaojun Yuan Sheng Xu |
| author_sort | Fali Huo |
| collection | DOAJ |
| description | During the towing of semisubmersible platforms, waves impact and superpose in front of the platform to form a ridge shaped “water ridge”, which protrudes near the platform and produces a large slamming pressure. The water ridges occur frequently in the towing conditions of semisubmersible platforms. The wave–slamming on the braces and columns of platform is aggravated due to the water ridges, particularly in rough sea conditions. The effect of water ridges is usually ignored in slamming pressure analysis, which is used to check the structural strengths of the braces and columns. In this paper, the characteristics of the water ridge at the braces of a semisubmersible platform are studied by experimental tests and numerical simulations. In addition, the sensitivity of the water ridge to the wave height and period is studied. The numerical simulations are conducted by a Computational Fluid Dynamics (CFD) method, and their accuracy is validated based on experimental tests. The characteristics of the water ridge and slamming pressure on the braces and columns are studied in different wave conditions based on the validated numerical model. It is found that the wave extrusion is the main reason of water ridge. The wave–slamming pressure caused by the water ridge has an approximately linear increase with the wave height and is sensitive to the wave period. With the increase of the wave period, the wave–slamming pressure on the brace and column of the platform increases first and then decreases. The maximum wave–slamming pressure is found when the wave period is 10 s and the slamming pressure reduces rapidly with an increase of wave period. |
| first_indexed | 2024-03-10T01:11:09Z |
| format | Article |
| id | doaj.art-4984f230e49e4190b86feb8afe6b1229 |
| institution | Directory Open Access Journal |
| issn | 2077-1312 |
| language | English |
| last_indexed | 2024-03-10T01:11:09Z |
| publishDate | 2022-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Journal of Marine Science and Engineering |
| spelling | doaj.art-4984f230e49e4190b86feb8afe6b12292023-11-23T14:17:16ZengMDPI AGJournal of Marine Science and Engineering2077-13122022-01-0110111610.3390/jmse10010116Research on the Water Ridge and Slamming Characteristics of a Semisubmersible Platform under Towing ConditionsFali Huo0Changdong Wei1Chenyang Zhu2Zhaojun Yuan3Sheng Xu4School of Naval Architecture and Ocean Engineering, Jiangsu University of Science and Technology, Zhenjiang 212028, ChinaSchool of Naval Architecture and Ocean Engineering, Jiangsu University of Science and Technology, Zhenjiang 212028, ChinaSchool of Naval Architecture and Ocean Engineering, Jiangsu University of Science and Technology, Zhenjiang 212028, ChinaSchool of Naval Architecture and Ocean Engineering, Jiangsu University of Science and Technology, Zhenjiang 212028, ChinaSchool of Naval Architecture and Ocean Engineering, Jiangsu University of Science and Technology, Zhenjiang 212028, ChinaDuring the towing of semisubmersible platforms, waves impact and superpose in front of the platform to form a ridge shaped “water ridge”, which protrudes near the platform and produces a large slamming pressure. The water ridges occur frequently in the towing conditions of semisubmersible platforms. The wave–slamming on the braces and columns of platform is aggravated due to the water ridges, particularly in rough sea conditions. The effect of water ridges is usually ignored in slamming pressure analysis, which is used to check the structural strengths of the braces and columns. In this paper, the characteristics of the water ridge at the braces of a semisubmersible platform are studied by experimental tests and numerical simulations. In addition, the sensitivity of the water ridge to the wave height and period is studied. The numerical simulations are conducted by a Computational Fluid Dynamics (CFD) method, and their accuracy is validated based on experimental tests. The characteristics of the water ridge and slamming pressure on the braces and columns are studied in different wave conditions based on the validated numerical model. It is found that the wave extrusion is the main reason of water ridge. The wave–slamming pressure caused by the water ridge has an approximately linear increase with the wave height and is sensitive to the wave period. With the increase of the wave period, the wave–slamming pressure on the brace and column of the platform increases first and then decreases. The maximum wave–slamming pressure is found when the wave period is 10 s and the slamming pressure reduces rapidly with an increase of wave period.https://www.mdpi.com/2077-1312/10/1/116water ridgeCFD methodwave–slammingsemisubmersible platformtowing condition |
| spellingShingle | Fali Huo Changdong Wei Chenyang Zhu Zhaojun Yuan Sheng Xu Research on the Water Ridge and Slamming Characteristics of a Semisubmersible Platform under Towing Conditions Journal of Marine Science and Engineering water ridge CFD method wave–slamming semisubmersible platform towing condition |
| title | Research on the Water Ridge and Slamming Characteristics of a Semisubmersible Platform under Towing Conditions |
| title_full | Research on the Water Ridge and Slamming Characteristics of a Semisubmersible Platform under Towing Conditions |
| title_fullStr | Research on the Water Ridge and Slamming Characteristics of a Semisubmersible Platform under Towing Conditions |
| title_full_unstemmed | Research on the Water Ridge and Slamming Characteristics of a Semisubmersible Platform under Towing Conditions |
| title_short | Research on the Water Ridge and Slamming Characteristics of a Semisubmersible Platform under Towing Conditions |
| title_sort | research on the water ridge and slamming characteristics of a semisubmersible platform under towing conditions |
| topic | water ridge CFD method wave–slamming semisubmersible platform towing condition |
| url | https://www.mdpi.com/2077-1312/10/1/116 |
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