%R 10.1051/matecconf/201820301022
%D 2018
%O cited By 0; Conference of 2018 International Conference on Civil, Offshore and Environmental Engineering 2018, ICCOEE 2018 ; Conference Date: 13 August 2018 Through 14 August 2018; Conference Code:140464
%V 203
%T Effect of Water Depths on the Hydrodynamic Responses of an FPSO Platform
%K Floating production storage and offloading; Frequency response; Hulls (ship); Hydrodynamics; Mooring; Numerical models; Offshore oil well production; Offshore oil wells; Time domain analysis, Commercial software; Coupled dynamic analysis; Floating production storage offloading; Hydrodynamic properties; Hydrodynamic response; Low-frequency response; Mooring line tensions; Statistical parameters, Mooring cables
%X Ship-shaped Floating Production Storage Offloading platforms (FPSO) are commonly used in the production of oil and gas in offshore deepwater regions. The vessel is held in place by mooring lines anchored to the seabed during operation, either in spread or turret mooring arrangement. When designing such systems, water depth is a main factor that needs to be considered. At greater depths, the hydrodynamic properties of mooring lines become important and may not be accurately predicted through traditional experiments or numerical quasi-static models. Numerical simulation using coupled dynamic analysis is thus recommended, as the hull-mooring behaviour is analysed simultaneously, and the damping and added mass properties of the entire mooring line system is taken into account. This paper investigates the motions and mooring line tensions of a turret-moored FPSO at various water depths ranging from 1000 m to 2000 m. The analysis focuses on numerical simulations in the fully coupled dynamic time domain. The study utilizes the commercial software AQWA, with the FPSO model subjected to a unidirectional random wave condition. The hull hydrodynamics is first solved using the 3D radiation/diffraction panel method, and the hull response equation is then coupled with the mooring line equation. The dynamic motions and mooring line tensions results are presented in terms of statistical parameters as well as response spectrum. The results highlight the significance of greater water depths on low frequency responses in surge motions and mooring line tensions, and provides insight on the increasing and decreasing trend of these responses. © The Authors, published by EDP Sciences, 2018.
%A M. Guan
%A M.O.A. Ali
%A C.Y. Ng
%L scholars9962
%I EDP Sciences
%J MATEC Web of Conferences