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논문 기본 정보

자료유형
학술저널
저자정보
Kang, Hooi-Siang (Faculty of Mechanical Engineering, Universiti Teknologi Malaysia) Kim, Moo-Hyun (Department of Ocean Engineering, Texas A&M University, College Station) Bhat Aramanadka, Shankar S. (Sabah Shell Petroleum Co. Ltd.) Kang, Heon-Yong (Department of Ocean Engineering, Texas A&M University, College Station) Lee, Kee-Quen (Department of Mechanical Precision Engineering, Malaysia-Japan International Institute of Technology [MJIIT], Universiti Teknologi Malaysia Kuala Lumpur)
저널정보
테크노프레스 Ocean systems engineering Ocean systems engineering 제7권 제3호
발행연도
2017.1
수록면
225 - 246 (22page)

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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.

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