Large LNG terminals are designed to be installed in an offshore area approximate to harbors where the water is of finite depth and waves are multi-directional. The terminal can be of a barge type LNG/FRSU including accommodations, gas preconditioning and liquefied plant, a number of storage tanks and offloading facilities. It serves also as a support to moor a LNG carrier during offloading operations. In the design of such mooring system of LNG/FRSU and LNG carriers in a zone of shallow water, one key issue is the accurate simulation of low-frequency motions of the system to which the second-order wave loading is well known as the main source of excitation. The computation of second-order wave loading in multi-directional waves of finite waterdepth is considered here. New formulations obtained recently in [1] for the computation of second-order loads in mono-directional waves are extended to the case of multi-directional waves. Both the classical near-field formulation and the new middle-field formulation developed in [1] are used and numerical results are compared. Unlike the usual near-field formulation giving results of second-order loads with poor convergence, the middle-field formulation provides an accurate method for the computation of vertical components.
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ASME 2007 26th International Conference on Offshore Mechanics and Arctic Engineering
June 10–15, 2007
San Diego, California, USA
Conference Sponsors:
- Ocean, Offshore and Arctic Engineering Division
Volume 1: Offshore Technology; Special Symposium on Ocean Measurements and Their Influence on Design
ISBN:
0-7918-4267-3
PROCEEDINGS PAPER
Second Order Loads on LNG Terminals in Multi-Directional Sea in Water of Finite Depth
Xin Li,
Xin Li
Shanghai Jiao Tong University, Shanghai, China
Search for other works by this author on:
Xiao-Bo Chen
Xiao-Bo Chen
Bureau Veritas, France; HEU, China
Search for other works by this author on:
Fla´via Rezende
Bureau Veritas, France
Xin Li
Shanghai Jiao Tong University, Shanghai, China
Xiao-Bo Chen
Bureau Veritas, France; HEU, China
Paper No:
OMAE2007-29231, pp. 259-266; 8 pages
Published Online:
May 20, 2009
Citation
Rezende, F, Li, X, & Chen, X. "Second Order Loads on LNG Terminals in Multi-Directional Sea in Water of Finite Depth." Proceedings of the ASME 2007 26th International Conference on Offshore Mechanics and Arctic Engineering. Volume 1: Offshore Technology; Special Symposium on Ocean Measurements and Their Influence on Design. San Diego, California, USA. June 10–15, 2007. pp. 259-266. ASME. https://doi.org/10.1115/OMAE2007-29231
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