Experimental analysis of dynamic response of floatover installation using rapid transfer technique in continuous load transfer process

This study presents the experimental analysis of an innovative floatover installation method with the rapid transfer technique, in which the topside loads can be transferred fast and safely. In the rapid transfer process, 30% loads were firstly transferred onto the jackets within only 1 min using th...

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Bibliographic Details
Published in:Journal of marine science and technology 2020-12, Vol.25 (4), p.1182-1198
Main Authors: Bai, Xiaodong, Luo, Hanbing, Xie, Peng
Format: Article
Language:English
Subjects:
Automotive Engineering
Barges
Decks
Dynamic response
Engineering
Engineering Design
Engineering Fluid Dynamics
Floatover
Jacking
Jacks
Load transfer
Loads (forces)
Mechanical Engineering
Offshore Engineering
Original Article
Piled platforms
Reproductive behaviour
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Summary:This study presents the experimental analysis of an innovative floatover installation method with the rapid transfer technique, in which the topside loads can be transferred fast and safely. In the rapid transfer process, 30% loads were firstly transferred onto the jackets within only 1 min using the jacking system. Then both the ballast system and the jacking system were employed to gradually transfer the loads onto the jackets. After 70% topside loads were transferred, the jacking system quickly offloads the remaining 30% loads within 1 min. The continuous load transfer operation was simulated in model tests. The complex motions of the barge and the topside as well as the loads on the Deck Support Unite (DSU) and the Leg Mating Unite (LMU) were analyzed. The maximum and minimum motions of the barge and the topside were statistically analyzed as well as DSU and LMU loads. Results indicate the barge pitch motions largely synchronize with the topside pitch before the second jack-down operation. The barge moved forward a little distance after twice jack-down operations. Results indicate DSU loads varied significantly during the jack-down operations and the jacking system should be designed to provide lateral restraints equivalent to 20% of the topside weight.
ISSN:0948-4280
1437-8213
DOI:10.1007/s00773-020-00708-7