Numerical and experimental research on the coupled motion responses of a Spar platform with a tender vessel during drilling scenarios

During the drilling operation of a Spar platform with a tender semisubmersible platform, the motion of the floating platforms is complex and quite different from that of the separate conditions due to the influence of multibody hydrodynamics and the connecting system. This can lead to potential coll...

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Bibliographic Details
Published in:Ocean engineering 2023-02, Vol.270, p.113687, Article 113687
Main Authors: Kang, Zhuang, Sui, Haibo, Ai, Shangmao
Format: Article
Language:English
Subjects:
Coupling effects
Gangway response
Multibody hydrodynamics
Semisubmersible platform
Spar platform
Tender-assisted drilling system
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Summary:During the drilling operation of a Spar platform with a tender semisubmersible platform, the motion of the floating platforms is complex and quite different from that of the separate conditions due to the influence of multibody hydrodynamics and the connecting system. This can lead to potential collision accidents. In this paper, the motion characteristics of a tender assistant drilling (TAD) system under drilling scenarios are analyzed numerically and experimentally. Based on three-dimensional potential flow theory, the numerical model of a multiple floating body system is established to obtain the hydrodynamic parameters, the first-order wave force, and the mean drift force, and then a time domain analysis is conducted. Both single-body and coupled multibody conditions are observed to analyze the motion performance of the gangway and the tension response of the connecting lines. The results show that the Spar platform affects the low-frequency motion of the semisubmersible platform more intensely when the platforms work side by side without hawser lines. The phenomenon of hydrodynamic interaction is weakened under fully coupled conditions due to this connection. In addition, the stroke of the gangway is positively related to the relative motion, which reflects the relative motion response of the platforms. •The surge-pitch coupled motion characteristics of the Spar platform and its effect on TDU are observed in detail.•The motion response of the two platforms with and without connection is discussed.•Response of hawser lines and the gangway is analyzed to study the relative motion.
ISSN:0029-8018
1873-5258
DOI:10.1016/j.oceaneng.2023.113687