Research On Mooring Performance And Analysis Of Mooring Forms Of Tension Leg Platform Wharf

In recent years,the deep-sea oil and gas resource exploration activities in countries around the world have become more frequent,resulting in increasing demand for oil and gas production platforms.The number of tension leg platform installation and maintenance operations has also increased.The impact of normal operation at the terminal is very large.This paper mainly uses ANSYS-AQWA software to analyze and study the hydrodynamic performance and mooring form of the platform based on the three-dimensional potential flow theory.The main research contents are summarized as follows:1.Understand the current development status of oil and gas production platforms,understand the future reserves and exploitation of offshore oil and gas resources from around the world,and judge the development trend of oil and gas platforms;according to the current state of development of our country,the wharf system of tension leg platforms Analyze the hydrodynamic performance and mooring form of the mooring to investigate the relevant data and list specific research ideas.2.The wind,wave,and current load calculation formulas are introduced,which can analyze and calculate the marine environment of the terminal;based on the three-dimensional potential flow theory,analyze the potential flow theory,diffraction,and radiation calculation process of the non-velocity floating body,and give the corresponding parameters.The solution process;the frequency and time domain calculation process of the tension leg platform is introduced,the relevant equations of motion and transfer functions are given,and the motion characteristics during the analysis process are explained;meanwhile,the mooring force and protection of the cables during platform mooring are also provided.The analysis of the side force gives an analysis method,and lists the relevant calculation formulas.Finally,it also understands and analyzes the relevant theories of multi-floating bodies.The hydrodynamic interaction between multi-floating bodies and the motion analysis of multi-floating bodies are the research for the mooring system of the tension leg platform dock The very important part can provide relevant theoretical basis for the subsequent analysis and calculation of the frequency domain hydrodynamics,the time domain platform motion response,and the analysis and calculation of the wharf fender force.3.Describe the establishment of the tension leg platform dock mooring system.First of all,it is to sort the parameters of the tension leg platform itself,understand the types of cables and their advantages and disadvantages,the types of fenders,determine the dock environment,and determine the platform's environment in the ocean.Explain the movement,understand the basic principles of platform mooring,and provide relevant theoretical basis for the subsequent model establishment,platform movement,and load application.4.Establish a finite element model for platform and dock mooring analysis,and obtain hydrodynamic parameters such as additional mass,radiation damping,motion response amplitude operator,and steady drift force after analysis.At the same time,this chapter uses different wave incident angles and different berthing positions.The two aspects comprehensively analyzed the hydrodynamic performance of the platform at the dock,summed up the platform's movement law under the condition of different wave incident angles and the law of the platform at different berthing positions with frequency,providing a reference for the platform dock selection in accordance.5.The time-domain analysis of the tension leg platform dock mooring system is mainly performed to analyze the impact of the motion response of the tension leg platform.The environmental loads in the directions of-90° and-180° are applied to the tension leg platform,respectively.The value of the operating response;the analysis of the force change of the wharf's fender can be obtained the fender reaction force performance and the importance of the wharf and platform structure;the analysis of the difference in the distance between the mooring piles of the wharf,The two aspects of motion response are compared,and the docking distance suitable for the platform is obtained.