Strength of submarine hoses in Chinese-lantern configuration from hydrodynamic loads on CALM buoy

Amaechi, Chiemela Victor and Hou, Xiaonan and Ye, Jianqiao (2019) Strength of submarine hoses in Chinese-lantern configuration from hydrodynamic loads on CALM buoy. Ocean Engineering, 171. pp. 429-442. ISSN 0029-8018

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Abstract

Catenary Anchor Leg Moorings (CALM) buoys are offshore structures that have been used for offloading, loading and discharge purposes. In this study, dynamic analysis is carried out on the submarine hoses attached to a CALM buoy and moored by six mooring lines in a water depth of 23.0 m. Two submarine hose-strings in Chinese-lantern configuration are attached underneath the buoy. Three environmental conditions are considered, representing West Africa Sea, North Sea and Gulf of Mexico (GoM), respectively. Hydrodynamic simulation using ANSYS AQWA is first conducted to determine response amplitude operators (RAOs) of the buoy. Coupled dynamic models, where both buoys and hoses are included, are developed using Orcaflex. Parametric studies are conducted to investigate the effects of hose hydrodynamic loads and flow angles on the structural behaviour of the hoses, including bending moments, effective tension and minimum bend radius. From the study, a guidance dynamic amplitude factor of 2.0 considering hydrodynamic loads on hose DAFhose is proposed.

Item Type:

Journal Article

Journal or Publication Title:

Ocean Engineering

Additional Information:

This is the author’s version of a work that was accepted for publication in Ocean Engineering. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Ocean Engineering, 171, 2019 DOI: 10.1016/j.oceaneng.2018.11.010

Uncontrolled Keywords:

/dk/atira/pure/subjectarea/asjc/2200/2212

Subjects:

?? hydrodynamic loadchinese-lantern configurationsubmarine hosecalm buoydynamic amplification factorcomposite riserstrengthoffshore structurescatenary mooringocean engineeringenvironmental engineering ??

Departments:

Faculty of Science and Technology > Engineering

ID Code:

129158

Deposited By:

ep_importer_pure

Deposited On:

27 Nov 2018 16:36

Refereed?:

Yes

Published?:

Published