Influence of low-frequency vessel motions on the fatigue response of steel catenary risers at the touchdown point
Fatigue design of a steel catenary riser (SCR) at the touchdown point (TDP) is a challenging problem. Many previous studies on this topic considered only the effect of wave-frequency (WF) vessel motions; the low-frequency (LF) motions are often neglected due to excessive computational costs. The LF...
| Main Authors: | , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2013
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| Online Access: | https://hdl.handle.net/10356/97663 http://hdl.handle.net/10220/12068 |
| _version_ | 1811682125321076736 |
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| author | Li, Feng Zi. Low, Ying Min. |
| author2 | School of Civil and Environmental Engineering |
| author_facet | School of Civil and Environmental Engineering Li, Feng Zi. Low, Ying Min. |
| author_sort | Li, Feng Zi. |
| collection | NTU |
| description | Fatigue design of a steel catenary riser (SCR) at the touchdown point (TDP) is a challenging problem. Many previous studies on this topic considered only the effect of wave-frequency (WF) vessel motions; the low-frequency (LF) motions are often neglected due to excessive computational costs. The LF vessel motion shifts the TDP, thus spreading the damage along the riser, but it can also increase the fatigue damage due to the bimodal stress response. Moreover, it may affect the trench depth and profile, and influence the WF dynamics. This paper investigates the above phenomenon to provide a better understanding. To avoid the high cost associated with simulating the combined WF and LF responses, this paper proposes a simple and efficient strategy for incorporating the LF motions. The approach is found to be satisfactory in accuracy, based on case studies that consider linear/non-linear soil models, as well as flat seabed and trench profiles. |
| first_indexed | 2024-10-01T03:51:52Z |
| format | Journal Article |
| id | ntu-10356/97663 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T03:51:52Z |
| publishDate | 2013 |
| record_format | dspace |
| spelling | ntu-10356/976632020-03-07T11:43:33Z Influence of low-frequency vessel motions on the fatigue response of steel catenary risers at the touchdown point Li, Feng Zi. Low, Ying Min. School of Civil and Environmental Engineering DRNTU::Engineering::Environmental engineering Fatigue design of a steel catenary riser (SCR) at the touchdown point (TDP) is a challenging problem. Many previous studies on this topic considered only the effect of wave-frequency (WF) vessel motions; the low-frequency (LF) motions are often neglected due to excessive computational costs. The LF vessel motion shifts the TDP, thus spreading the damage along the riser, but it can also increase the fatigue damage due to the bimodal stress response. Moreover, it may affect the trench depth and profile, and influence the WF dynamics. This paper investigates the above phenomenon to provide a better understanding. To avoid the high cost associated with simulating the combined WF and LF responses, this paper proposes a simple and efficient strategy for incorporating the LF motions. The approach is found to be satisfactory in accuracy, based on case studies that consider linear/non-linear soil models, as well as flat seabed and trench profiles. 2013-07-23T06:55:48Z 2019-12-06T19:45:02Z 2013-07-23T06:55:48Z 2019-12-06T19:45:02Z 2012 2012 Journal Article Li, F. Z., & Low, Y. M. (2012). Influence of low-frequency vessel motions on the fatigue response of steel catenary risers at the touchdown point. Ships and Offshore Structures, 1-15. 1744-5302 https://hdl.handle.net/10356/97663 http://hdl.handle.net/10220/12068 10.1080/17445302.2012.740874 en Ships and offshore structures © 2012 Taylor & Francis. |
| spellingShingle | DRNTU::Engineering::Environmental engineering Li, Feng Zi. Low, Ying Min. Influence of low-frequency vessel motions on the fatigue response of steel catenary risers at the touchdown point |
| title | Influence of low-frequency vessel motions on the fatigue response of steel catenary risers at the touchdown point |
| title_full | Influence of low-frequency vessel motions on the fatigue response of steel catenary risers at the touchdown point |
| title_fullStr | Influence of low-frequency vessel motions on the fatigue response of steel catenary risers at the touchdown point |
| title_full_unstemmed | Influence of low-frequency vessel motions on the fatigue response of steel catenary risers at the touchdown point |
| title_short | Influence of low-frequency vessel motions on the fatigue response of steel catenary risers at the touchdown point |
| title_sort | influence of low frequency vessel motions on the fatigue response of steel catenary risers at the touchdown point |
| topic | DRNTU::Engineering::Environmental engineering |
| url | https://hdl.handle.net/10356/97663 http://hdl.handle.net/10220/12068 |
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