Extreme springing response statistics of a tethered platform by deconvolution
The research examines the motion response and hydrodynamic wave loads of a deep-water Tension Leg Platform (TLP), emphasising the impacts of the wave sum frequency on the restrained modes of heave, roll, and pitch. The stochastic TLP structural reaction in a random sea state was precisely computed u...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2023-01-01
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| Series: | International Journal of Naval Architecture and Ocean Engineering |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2092678223000043 |
| _version_ | 1797377869584793600 |
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| author | Oleg Gaidai Yu Cao Yihan Xing Rajiv Balakrishna |
| author_facet | Oleg Gaidai Yu Cao Yihan Xing Rajiv Balakrishna |
| author_sort | Oleg Gaidai |
| collection | DOAJ |
| description | The research examines the motion response and hydrodynamic wave loads of a deep-water Tension Leg Platform (TLP), emphasising the impacts of the wave sum frequency on the restrained modes of heave, roll, and pitch. The stochastic TLP structural reaction in a random sea state was precisely computed using a Volterra series representation of the TLP corner vertical displacement, which was selected as a response process. The wave loading was evaluated using the second-order diffraction code WAMIT and applied to a linear damped mass-spring model representing the dynamic system. Then, platform displacement response at the design low probability level has been determined using a novel deconvolution approach. Since the Volterra series represented the analytical solution, the exact Volterra and the approximated predictions have been compared in this study. The latter provided an accurate way to validate the effectiveness and precision of the proposed novel deconvolution method. Compared to existing engineering techniques, the most attractive advantage of the proposed deconvolution method is that it does not rely on any pre-assumed asymptotic probability distribution class. The latter may be an attractive point for practical engineering design. Thus the primary objective of this work was to validate a novel deconvolution approach using exact quasi-analytical solutions. This work also highlights the limitations of mean up-crossing rate-based extrapolation methodologies for the situation of narrowband effects, including clustering, which are often included in the springing type of response. |
| first_indexed | 2024-03-08T19:59:34Z |
| format | Article |
| id | doaj.art-d4d034f41f8249e79614fcdfe1041ae2 |
| institution | Directory Open Access Journal |
| issn | 2092-6782 |
| language | English |
| last_indexed | 2024-03-08T19:59:34Z |
| publishDate | 2023-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | International Journal of Naval Architecture and Ocean Engineering |
| spelling | doaj.art-d4d034f41f8249e79614fcdfe1041ae22023-12-24T04:45:08ZengElsevierInternational Journal of Naval Architecture and Ocean Engineering2092-67822023-01-0115100515Extreme springing response statistics of a tethered platform by deconvolutionOleg Gaidai0Yu Cao1Yihan Xing2Rajiv Balakrishna3College of Engineering Science and Technology, Shanghai Ocean University, Shanghai, ChinaCollege of Engineering Science and Technology, Shanghai Ocean University, Shanghai, China; Corresponding author.Department of Mechanical and Structural Engineering and Material Sciences, University of Stavanger, Stavanger, NorwayDepartment of Mechanical and Structural Engineering and Material Sciences, University of Stavanger, Stavanger, NorwayThe research examines the motion response and hydrodynamic wave loads of a deep-water Tension Leg Platform (TLP), emphasising the impacts of the wave sum frequency on the restrained modes of heave, roll, and pitch. The stochastic TLP structural reaction in a random sea state was precisely computed using a Volterra series representation of the TLP corner vertical displacement, which was selected as a response process. The wave loading was evaluated using the second-order diffraction code WAMIT and applied to a linear damped mass-spring model representing the dynamic system. Then, platform displacement response at the design low probability level has been determined using a novel deconvolution approach. Since the Volterra series represented the analytical solution, the exact Volterra and the approximated predictions have been compared in this study. The latter provided an accurate way to validate the effectiveness and precision of the proposed novel deconvolution method. Compared to existing engineering techniques, the most attractive advantage of the proposed deconvolution method is that it does not rely on any pre-assumed asymptotic probability distribution class. The latter may be an attractive point for practical engineering design. Thus the primary objective of this work was to validate a novel deconvolution approach using exact quasi-analytical solutions. This work also highlights the limitations of mean up-crossing rate-based extrapolation methodologies for the situation of narrowband effects, including clustering, which are often included in the springing type of response.http://www.sciencedirect.com/science/article/pii/S2092678223000043TLPWAMITExtreme statisticsVolterra seriesWaves |
| spellingShingle | Oleg Gaidai Yu Cao Yihan Xing Rajiv Balakrishna Extreme springing response statistics of a tethered platform by deconvolution International Journal of Naval Architecture and Ocean Engineering TLP WAMIT Extreme statistics Volterra series Waves |
| title | Extreme springing response statistics of a tethered platform by deconvolution |
| title_full | Extreme springing response statistics of a tethered platform by deconvolution |
| title_fullStr | Extreme springing response statistics of a tethered platform by deconvolution |
| title_full_unstemmed | Extreme springing response statistics of a tethered platform by deconvolution |
| title_short | Extreme springing response statistics of a tethered platform by deconvolution |
| title_sort | extreme springing response statistics of a tethered platform by deconvolution |
| topic | TLP WAMIT Extreme statistics Volterra series Waves |
| url | http://www.sciencedirect.com/science/article/pii/S2092678223000043 |
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