Numerical Assessment on the Dynamic Behaviour of Submarine Hoses Attached to CALM Buoy Configured as Lazy-S under Water Waves

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by

Jawad Ali
in
Numerical Assessment on the Dynamic Behaviour of Submarine Hoses Attached to CALM Buoy Configured as Lazy-S under Water WavesDownload

Abstract: Recent design challenges in ocean observations, energy storage, offloading/discharging, and loading operations in both the offshore-renewable industry have led to advances in the application of catenary anchor leg moorings (CALM) buoys. Due to different seabed profiles, soil stiffness and environmental conditions, there is the need for numerical assessment to investigate the behaviour of the submarine hoses, based on the structural and hydrodynamic behaviour. In this study, experimental and numerical investigations are carried out on the dynamic behaviour of the submarine hoses attached to a CALM buoy in Lazy-S configuration. Six mooring lines are attached to the CALM buoy with a water depth of 100 m in the numerical model. A hydrodynamic model utilising ANSYS AQWA was developed then coupled unto the dynamic model in Orcina’s Orcaflex. The studies were carried out to study the effect of flow angles, wave height, soil stiffness and hydrodynamic loads on the structural behaviour of the submarine hoses. Waves at different angles to the submarine hose affected the effective tension more where the hose bends due to the floats attached. Parametric studies were carried out on both linear and nonlinear seabed models, and recommendations were made from the investigations on the submarine hose models.

Author(s): Chiemela Victor Amaechi, Facheng Wang, Jianqiao Ye

Date Published: October 15, 2021

Depositing User: Jawad Ali

DOI: https://doi.org/10.3390/jmse9101130

Keywords: offshore-renewable industry; lazy-s configuration; submarine hose; floating hose; catenary anchor leg mooring (calm) buoy; hydrodynamics; ocean engineering; bonded marine hoses; marine riser; ocean waves; floating offshore platform (fos)

Pages: 1-48

Place of publication: Switzerland

Publication title: Journal of Marine Science and Engineering

Published URL: https://www.mdpi.com/2077-1312/9/10/1130

Subject(s): Marine Science and Engineering

Type of publication: Journal