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Dynamic Responses of FPSO

Jafri, Puteri Nurul Hidayah (2014) Dynamic Responses of FPSO. IRC, Universiti Teknologi PETRONAS. (Unpublished)

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Abstract

Floating Production Storage and Offloading (FPSO) is a vessel that are currently in demand all over the world in which it is operated in a deep water region. Fixed platforms such as the bottom-supported steel jackets and concrete platforms are said to be impractical in the economic point of view which pipelines need to be installed along the seabed which is very costly especially in the deep water areas. Most floating production units is a buoyant structure which allows six degree of motion in surge, heave, pitch, yaw, sway, and roll. This floating structure is able to rotate freely in response to harsh environment and the mooring system used is disconnectable from the FPSO so that it can be protected from natural disaster such as Hurricane and Katrina. The need to possess a study on this floating structure on the dynamic responses due to environmental load is essential for excellent operation in the deep water areas. The dimension of FPSO is taken from FPSO Berantai project whereas the environmental data conditions were taken from the Petronas Technical Standards (PTS) for operating condition which consist of wave height, period, wind and current speed. FPSO is modelled as a floating structure with three degrees of motion: surge, heave and pitch motion. Since FPSO is a very large structure, the excitation of wave forces acting on this floating structure is calculated by using the Froude-Krylov Theory. This theory utilizes the incident wave pressure and pressure-area method on large surface to determine the forces. The ship’s behavior and motion is studied by using Response Amplitude Operator (RAO) to determine the sea state when there is a ship move along the water. Frequency Domain Analysis was used to conduct hydrodynamic analysis in order to determine the floating platform motion in surge, heave and pitch motion in regular and random wave. The energy distribution on sea is represented using frequency domain analysis and wave motion profile was generated using P-M wave spectrum. In a conclusion, it is vital to determine the motion on each direction to ensure the safety of the FPSO and maintain the operation in the most ideal and stabilize condition.

Item Type: Final Year Project
Academic Subject : Academic Department - Civil Engineering - Water and environment - Water
Subject: T Technology > TA Engineering (General). Civil engineering (General)
Divisions: Engineering > Civil
Depositing User: Ahmad Suhairi Mohamed Lazim
Date Deposited: 02 Feb 2015 10:20
Last Modified: 25 Jan 2017 09:36
URI: http://utpedia.utp.edu.my/id/eprint/14623

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