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Dynamic Analysis of Multi-points Mooring System for Semi-submersible Platform

Author: LiZhiHai
Tutor: XuXingPing
School: China University of Petroleum
Course: Mechanical Engineering
Keywords: Semi-submersible platform Multi- point mooring system Dynamic Analysis Finite Element Method
CLC: TE952
Type: Master's thesis
Year: 2010
Downloads: 144
Quote: 4
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Abstract


Today's world demand for oil resources even more increases , onshore and offshore oil resources has gradually reduced or even depleted , Therefore, in order to meet the growing energy demand , countries are the focus of the development of the oil and gas resources transferred to the deep ocean . The adaptability of the semi-submersible platform for deep-sea work , widely used in the drilling, production , processing and storage . In most sea conditions in order to ensure a semi-submersible platform can work properly , mooring system played a vital role . Need to design and carry out the following tasks : (1) static mooring system analysis . Using catenary law and the establishment of a multi-component catenary equation calculated chain tension catenary , for example the two components . (2) mooring system dynamic analysis . Lumped mass method on a two-dimensional , three-dimensional mooring hawser power analysis to establish the equations of motion of the mooring line and the constraint equations , and discrete finite element difference method Houbolt format , using Newton - Simpson iteration , solving the equations of motion . ( 3) Department of mooring systems domain coupled analysis . Create the time domain of the mooring system of coupled equations in the time domain , and the system load from the frequency domain to time domain transform . ( 4 ) the use of ABAQUS software analysis and calculation of the multi - point mooring system . The two-dimensional model of a multi-point mooring system , compared to consider and not consider fairlead at the initial displacement of the two situations , at the fairlead tension and displacement curves . Then create a three-dimensional model and compared the dynamic characteristics of the mooring system is eight o'clock and twelve o'clock . For actual engineering reference value .

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CLC: > Industrial Technology > Oil and gas industry > Oil machinery and equipment and automation > Offshore oil and gas field development and mining machinery and equipment > Sea mining machinery and equipment
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