單點系泊的漂浮式波浪發(fā)電平臺運動特性研究
[Abstract]:Single-point mooring system plays an important role in island construction, marine development, marine agricultural production and other fields. In order to ensure that the single point mooring system has a high degree of reliability and good environmental adaptability under different marine environmental loads, as well as the normal operation of the equipment on the platform and the safety of the staff, It is very important to accurately simulate the motion characteristics of a single point mooring system under different environmental loads. In this paper, referring to the relevant specifications for the design of DNV offshore floating platform, the coupled system composed of wave power platform, cable, buoy and anchor chain under mooring condition is considered as a whole in wind and wave. The stability of the platform under ocean environmental loads such as current is studied. The main contents of this paper include the following four aspects: (1) based on the potential current theory, The mathematical model of "wave power platform-cable-buoy-anchor chain-anchor" is established by governing equation and boundary condition. The motion of two interacting floating bodies is decomposed, and the diffraction potential and radiation potential of each floating body are obtained by integrating the velocity potential. The general motion equation of mooring system of floating wave power platform is obtained. (2) the dynamic analysis of anchor chain system is carried out by using geometric nonlinear finite element method. An example is given to verify that the method can get the mooring chain movement state correctly. At the same time, the force and position of the mooring chain under different main control parameters are analyzed. Finally, the nonlinear dynamic response of the mooring chain is summarized. (3) the coupling analysis of the floating wave power generation platform with the mooring chain connected with the mooring buoy is carried out by using the hydrodynamic software AQWA. The effects of the additional mass force, radiation damping force, response RAO value of six degrees of freedom, and the variation of the incidence angle of environmental load and the inclination angle of mooring chain on the motion characteristics of the power generation platform are analyzed under regular wave conditions, including the variation of the additional mass force, the radiation damping force, the response of six degrees of freedom and the angle of inclination of the mooring chain. The simulation results are verified with the existing experimental data, which shows that the simulation results can reflect the experimental results to a large extent and is feasible. (4) the random wave and wind are analyzed. The mooring floating wave power platform and its mooring cable in the ocean environment such as current and other marine environment are moored in the extreme sea conditions. The influence of spectral peak factor on the power generation platform is analyzed, including wind, wave, wind, wave and so on. Movement of mooring chain and platform in the case of current collinear and non-collinear.
【學(xué)位授予單位】:集美大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2017
【分類號】:U674.37;TM612
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