Research On Horizontal Vibration Control And Kinetic Energy Utilization Of Deep Sea Tension Leg Platform

The world energy development will enter a new era of environmental protection.How to introduce the concept of resource recycling in the existing energy development process,and optimize the existing energy development mode are the key problems that most energy industries need to solve urgently.In offshore oil and gas development,the performance of the oil production platform directly determines the production efficiency and safety reliability of the whole oilfield.Especially in deep sea floating platform,under the action of continuous wind,wave and flow,a large amount of overall movement will occur,which will easily lead to damage or reduce service life of the platform.The motion suppression device for floating platform can improve its motion performance,but it is difficult to apply it because of its single function.On the other hand,the ocean wave energy reserves in the world are huge.However,due to the changeable sea conditions,there are many constraints in the energy conversion process,and the existing wave energy generation devices have some limitations.Based on the above considerations,this study aims to use the floating platform motion suppression and ocean wave existing power combined with the tuned liquid column dampe(TLCD)as the basis,to carry out research on the electric energy into the floating platform can be absorbed by the damping device of large kinetic energy,is expected to provide power precious resources for platform.In this paper,a TLP platform is used for vibration reduction analysis to verify the feasibility of generating power by using its internal oscillating water column.Aiming at the improved design of traditional TLCD,a new type of TLCD with power generation function is proposed.In the horizontal section of the damper,the flat rotary power generation device is used instead of the traditional orifice plate to realize the power conversion of the oscillating liquid column in the TLCD.Based on the mechanical analysis of a typical flat propelling device,the mechanical principle is deduced and verified with the literature results,and the correctness of the derived formula is proved.It is then applied to the mechanical analysis of the rotating blades in the flat rotary power generation unit,and the damping force expression of the new type flat spinning power generation device is obtained.Based on the hydrodynamic analysis of the blade,the relationship between the drag force and the lift force of the new blade and the angle of attack of the inflow is obtained,and then applied it to the flat rotary power generation unit,and a complete mechanical analysis model of the flat rotary power generation device is established.Combined this theory with the traditional TLCD,the coupling analysis of TLCD and flat rotary power generation device is carried out,and the new mechanical performance expression of the TLCD based flat rotary vibration damping power generation device is obtained.Then carried out the key parameters of the power plant,such as leaf width,length,leaf number and sensitivity analysis,explore the interrelationship between blade width,length blade numbers and the damping force insider the TLCD.The regression equation based on the damping effect is put forward,and the influence of the variation of the external excitation period on the selection of key parameters is analyzed.At the same time,using Betz theorem,the power generation efficiency of the corresponding flat vibration damping power generation device under different parameters is calculated,which provides reference for practical work.