A numerical analysis of the response and air gap demand for semi-submersibles
This paper examines the effects of viscous damping on the prediction of air gap demand for semi-submersibles. This is illustrated by a case study of a typical six-column, double pontoon semi-submersible in irregular waves. Linear responses of the platform and free-surface elevations at selected loca...
| Main Authors: | , , , , , , , |
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| Other Authors: | |
| Format: | Conference Paper |
| Language: | English |
| Published: |
2013
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/99836 http://hdl.handle.net/10220/10533 |
| _version_ | 1826118718051057664 |
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| author | Kurniawan, Adi Huang, Zhenhua Li, Jing Liu, Chunrong Wang, Xikun Hao, Zhiyong Tan, Soon Keat Nah, Edwin |
| author2 | School of Civil and Environmental Engineering |
| author_facet | School of Civil and Environmental Engineering Kurniawan, Adi Huang, Zhenhua Li, Jing Liu, Chunrong Wang, Xikun Hao, Zhiyong Tan, Soon Keat Nah, Edwin |
| author_sort | Kurniawan, Adi |
| collection | NTU |
| description | This paper examines the effects of viscous damping on the prediction of air gap demand for semi-submersibles. This is illustrated by a case study of a typical six-column, double pontoon semi-submersible in irregular waves. Linear responses of the platform and free-surface elevations at selected locations are computed using WAMIT, in which viscous damping effects are included through the use of a linear damping matrix. The spectra of the platform’s response and of the relative free-surface elevation at the selected locations, as well as the probability distributions of air gap minima obtained using different damping matrices are compared. It is demonstrated that correct modelling of viscous damping is important for an accurate prediction of air gap demand of a floating platform, especially if the peak frequency of the wave spectrum is close to the heave, roll, and pitch natural frequencies of the platform. |
| first_indexed | 2024-10-01T04:48:03Z |
| format | Conference Paper |
| id | ntu-10356/99836 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T04:48:03Z |
| publishDate | 2013 |
| record_format | dspace |
| spelling | ntu-10356/998362020-03-07T11:43:28Z A numerical analysis of the response and air gap demand for semi-submersibles Kurniawan, Adi Huang, Zhenhua Li, Jing Liu, Chunrong Wang, Xikun Hao, Zhiyong Tan, Soon Keat Nah, Edwin School of Civil and Environmental Engineering International Conference on Ocean, Offshore and Arctic Engineering (28th : 2009 : Honolulu, USA) DRNTU::Social sciences::Geography::Oceanography This paper examines the effects of viscous damping on the prediction of air gap demand for semi-submersibles. This is illustrated by a case study of a typical six-column, double pontoon semi-submersible in irregular waves. Linear responses of the platform and free-surface elevations at selected locations are computed using WAMIT, in which viscous damping effects are included through the use of a linear damping matrix. The spectra of the platform’s response and of the relative free-surface elevation at the selected locations, as well as the probability distributions of air gap minima obtained using different damping matrices are compared. It is demonstrated that correct modelling of viscous damping is important for an accurate prediction of air gap demand of a floating platform, especially if the peak frequency of the wave spectrum is close to the heave, roll, and pitch natural frequencies of the platform. 2013-06-24T06:26:59Z 2019-12-06T20:12:10Z 2013-06-24T06:26:59Z 2019-12-06T20:12:10Z 2009 2009 Conference Paper Kurniawan, A., Huang, Z., Li, J., Liu, C., Wang, X., Hao, Z., et al. (2009). A Numerical Analysis of the Response and Air Gap Demand for Semi-Submersibles. ASME 2009 28th International Conference on Ocean, Offshore and Arctic Engineering, 6, pp.355-363. https://hdl.handle.net/10356/99836 http://hdl.handle.net/10220/10533 10.1115/OMAE2009-79163 en © 2009 ASME. |
| spellingShingle | DRNTU::Social sciences::Geography::Oceanography Kurniawan, Adi Huang, Zhenhua Li, Jing Liu, Chunrong Wang, Xikun Hao, Zhiyong Tan, Soon Keat Nah, Edwin A numerical analysis of the response and air gap demand for semi-submersibles |
| title | A numerical analysis of the response and air gap demand for semi-submersibles |
| title_full | A numerical analysis of the response and air gap demand for semi-submersibles |
| title_fullStr | A numerical analysis of the response and air gap demand for semi-submersibles |
| title_full_unstemmed | A numerical analysis of the response and air gap demand for semi-submersibles |
| title_short | A numerical analysis of the response and air gap demand for semi-submersibles |
| title_sort | numerical analysis of the response and air gap demand for semi submersibles |
| topic | DRNTU::Social sciences::Geography::Oceanography |
| url | https://hdl.handle.net/10356/99836 http://hdl.handle.net/10220/10533 |
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