Suppression of tension variations in hydro-pneumatic riser tensioner by using force compensation control
Excessive dynamic-tension variations on the top-tensioned risers (TTRs) deteriorate the structural integrity and cause potential safety hazards. This phenomenon has become more remarkable in the development of deep-water fields with harsher environmental loads. The conventional prediction method of...
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| Format: | Article |
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Techno Press
2017
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| _version_ | 1796862610537185280 |
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| author | Kang, H. S. Kim, M. H. Aramanadka, S. S. B. Kang, H. Y. Lee, K. Q. |
| author_facet | Kang, H. S. Kim, M. H. Aramanadka, S. S. B. Kang, H. Y. Lee, K. Q. |
| author_sort | Kang, H. S. |
| collection | ePrints |
| description | Excessive dynamic-tension variations on the top-tensioned risers (TTRs) deteriorate the structural integrity and cause potential safety hazards. This phenomenon has become more remarkable in the development of deep-water fields with harsher environmental loads. The conventional prediction method of tension variations in hydro-pneumatic tensioner (HPT) has the disadvantage to underestimate the magnitude of cyclic loads. The actual excessive dynamic tension variations are larger when considering the viscous frictional fluid effects. In this paper, a suppression method of tension variations in HPT is modeled by incorporating the magneto-rheological (MR) damper and linear-force actuator. The mathematical models of the combined HPT and MR damper are developed and a force-control scheme is introduced to compensate the excessive tension variations on the riser tensioner ring. Numerical simulations and analyses are conducted to evaluate the suppression of tension variations in HPT under both regular- and irregular-wave conditions for a drilling riser of a tensioned-leg platform (TLP). The results show that significant reduction of tension variations can be achieved by introducing the proposed system. This research has provided a theoretical foundation for the HPT tension control and related structural protection. |
| first_indexed | 2024-03-05T20:14:14Z |
| format | Article |
| id | utm.eprints-76996 |
| institution | Universiti Teknologi Malaysia - ePrints |
| last_indexed | 2024-03-05T20:14:14Z |
| publishDate | 2017 |
| publisher | Techno Press |
| record_format | dspace |
| spelling | utm.eprints-769962018-04-30T14:32:22Z http://eprints.utm.my/76996/ Suppression of tension variations in hydro-pneumatic riser tensioner by using force compensation control Kang, H. S. Kim, M. H. Aramanadka, S. S. B. Kang, H. Y. Lee, K. Q. TJ Mechanical engineering and machinery Excessive dynamic-tension variations on the top-tensioned risers (TTRs) deteriorate the structural integrity and cause potential safety hazards. This phenomenon has become more remarkable in the development of deep-water fields with harsher environmental loads. The conventional prediction method of tension variations in hydro-pneumatic tensioner (HPT) has the disadvantage to underestimate the magnitude of cyclic loads. The actual excessive dynamic tension variations are larger when considering the viscous frictional fluid effects. In this paper, a suppression method of tension variations in HPT is modeled by incorporating the magneto-rheological (MR) damper and linear-force actuator. The mathematical models of the combined HPT and MR damper are developed and a force-control scheme is introduced to compensate the excessive tension variations on the riser tensioner ring. Numerical simulations and analyses are conducted to evaluate the suppression of tension variations in HPT under both regular- and irregular-wave conditions for a drilling riser of a tensioned-leg platform (TLP). The results show that significant reduction of tension variations can be achieved by introducing the proposed system. This research has provided a theoretical foundation for the HPT tension control and related structural protection. Techno Press 2017 Article PeerReviewed Kang, H. S. and Kim, M. H. and Aramanadka, S. S. B. and Kang, H. Y. and Lee, K. Q. (2017) Suppression of tension variations in hydro-pneumatic riser tensioner by using force compensation control. Ocean Systems Engineering, 7 (3). pp. 225-246. ISSN 2093-6702 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85029869382&doi=10.12989%2fose.2017.7.3.225&partnerID=40&md5=fc7092fb89671165c376dc1554da13ed DOI:10.12989/ose.2017.7.3.225 |
| spellingShingle | TJ Mechanical engineering and machinery Kang, H. S. Kim, M. H. Aramanadka, S. S. B. Kang, H. Y. Lee, K. Q. Suppression of tension variations in hydro-pneumatic riser tensioner by using force compensation control |
| title | Suppression of tension variations in hydro-pneumatic riser tensioner by using force compensation control |
| title_full | Suppression of tension variations in hydro-pneumatic riser tensioner by using force compensation control |
| title_fullStr | Suppression of tension variations in hydro-pneumatic riser tensioner by using force compensation control |
| title_full_unstemmed | Suppression of tension variations in hydro-pneumatic riser tensioner by using force compensation control |
| title_short | Suppression of tension variations in hydro-pneumatic riser tensioner by using force compensation control |
| title_sort | suppression of tension variations in hydro pneumatic riser tensioner by using force compensation control |
| topic | TJ Mechanical engineering and machinery |
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