Offshore platform rigid riser span analysis and experimental studies
A rigid riser mechanically clamped to an offshore wellhead platform experiences vortex induced vibration due to action of seawater waves and currents. If occuring at the natural frequency of free span, it will induce a large amplitude vibration that may lead to fatigue failure at the girth welds of...
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| Other Authors: | |
| Format: | Thesis |
| Language: | English |
| Published: |
2010
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| Online Access: | https://hdl.handle.net/10356/41572 |
| _version_ | 1826124476088057856 |
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| author | Ong, Yean Chau |
| author2 | Gho Wie Min |
| author_facet | Gho Wie Min Ong, Yean Chau |
| author_sort | Ong, Yean Chau |
| collection | NTU |
| description | A rigid riser mechanically clamped to an offshore wellhead platform experiences vortex induced vibration due to action of seawater waves and currents. If occuring at the natural frequency of free span, it will induce a large amplitude vibration that may lead to fatigue failure at the girth welds of pipe joints. To assess if the maximum riser span between the clamps is acceptable, the current practice is to determine based on the same methodology for analyzing the free span of submarine pipelines on the seabed. These methods for assessment have been well described in detail in the MULTISPAN project carried out by Norsk Agip and Statoil (Mark, Vitali and Verley, 1997) and subsequently in Det Norske Veritas (DNV)standards, Guidelines No. 14 and DNV-RP-F105. |
| first_indexed | 2024-10-01T06:20:55Z |
| format | Thesis |
| id | ntu-10356/41572 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T06:20:55Z |
| publishDate | 2010 |
| record_format | dspace |
| spelling | ntu-10356/415722023-03-03T19:26:03Z Offshore platform rigid riser span analysis and experimental studies Ong, Yean Chau Gho Wie Min Lie Seng Tjhen School of Civil and Environmental Engineering DRNTU::Engineering::Civil engineering::Water resources A rigid riser mechanically clamped to an offshore wellhead platform experiences vortex induced vibration due to action of seawater waves and currents. If occuring at the natural frequency of free span, it will induce a large amplitude vibration that may lead to fatigue failure at the girth welds of pipe joints. To assess if the maximum riser span between the clamps is acceptable, the current practice is to determine based on the same methodology for analyzing the free span of submarine pipelines on the seabed. These methods for assessment have been well described in detail in the MULTISPAN project carried out by Norsk Agip and Statoil (Mark, Vitali and Verley, 1997) and subsequently in Det Norske Veritas (DNV)standards, Guidelines No. 14 and DNV-RP-F105. MASTER OF ENGINEERING (CEE) 2010-07-21T07:42:54Z 2010-07-21T07:42:54Z 2010 2010 Thesis Ong, Y. C. (2010). Offshore platform rigid riser span analysis and experimental studies. Master’s thesis, Nanyang Technological University, Singapore. https://hdl.handle.net/10356/41572 10.32657/10356/41572 en 139 p. application/pdf |
| spellingShingle | DRNTU::Engineering::Civil engineering::Water resources Ong, Yean Chau Offshore platform rigid riser span analysis and experimental studies |
| title | Offshore platform rigid riser span analysis and experimental studies |
| title_full | Offshore platform rigid riser span analysis and experimental studies |
| title_fullStr | Offshore platform rigid riser span analysis and experimental studies |
| title_full_unstemmed | Offshore platform rigid riser span analysis and experimental studies |
| title_short | Offshore platform rigid riser span analysis and experimental studies |
| title_sort | offshore platform rigid riser span analysis and experimental studies |
| topic | DRNTU::Engineering::Civil engineering::Water resources |
| url | https://hdl.handle.net/10356/41572 |
| work_keys_str_mv | AT ongyeanchau offshoreplatformrigidriserspananalysisandexperimentalstudies |