Study On Energy Capture Characteristics Of An Integrated System Of Wave Gathering Platform And Wave Energy Generator

The ocean platform provides important support for the exploration of the ocean and the development of the ocean economy.The ocean platform can realize the Marine monitoring,communication and other functions,which is of great significance for the further development of the ocean and the vigorous development of Marine resources.As the structure and function of offshore platforms are gradually diversified and the exploitation and utilization of Marine resources are becoming more and more extensive,the problem of energy supply has become a bottleneck in the development of offshore platforms.Therefore,exploring new power supply mode can effectively solve the problem of power supply shortage.The wave power generation device can be integrated with the offshore platform to con vert the destructive power of the wave to the platform into electricity,which provides a new way to solve the power problem of the platform.In this paper,an integrated system of a poly-wave platform and a point-absorption wave energy generating device is designed.The changes of wave field near the poly-wave wall are studied,and the influence law of various parameters of the platform on the energy harvesting effect of the float is analyzed.The array form of the float is designed combining with the incident Angle of the wave.First of all,the background and significance of the research topic are expounded,the types of offshore platforms and wave energy generation devices are introduced,the forms of integration of offshore platforms and wave energy generation devices at home and abroad are summarized,and the application theory and technology exploration of poly wave structure in the field of ocean engineering are given.According to the research status and existing problems,the research content of this paper is proposed.Secondly,according to the potential flow theory,the analytical model of the integrated system of float and offshore platform is established.By setting the boundary conditions,the solution results of the regular wave dynamic coefficient are obtained,so as to obtain the sag motion equation of float in the frequency domain.The energy capture power model of float in the frequency domain is establ ished,which prov ides the theoretical basis for the analysis of the energy capture effect of float.Thirdly,a numerical flume model of polygonal wall and vertical wall was established in Flow-3D based on N-S equation,and RNG k-ε turbulence model was used to simulate waves.The boundary conditions and incident wave parameters are set up and the grid is divided.By comparing the height of free water near the vertical wall and the poly wall with different wave periods and different wave heights,the variation law of the wave surface near the poly wall was obtained,and the effect of the poly wall on the wave lifting was quantified,which provided the flow field conditions for the integration of the wave energy generating device and the poly platform.Then,the influence of the change of the parameters of the poly-wall and the float on the hydrodynamic performance is analyzed.By comparing the changes of the hydrodynamic parameters of the float with the poly wall,the vertical wall and the float alone,it is found that the poly wall can effectively improve the hydrodynamic parameters of the float.The relationship between amplitude response operator,wave force and wave frequency of a single float located at the focal point is analyzed by changing the parameters of the poly wall,and the law of the influence of the hydrodynamic parameters of the float on the poly wall is given.Different float array forms are designed,and the effect of the array float on the distance of the float and the direction of the incident wave in the convergence region is given,and the variation law of the energy harvesting effect of the array float is obtained.Finally,the wave data of Chinese sea area in the last ten years are analyzed,and the wave cycle and probability distribution of wave height are given.Five sea areas are selected for layout design,and the average annual output power of each array integrated system is calculated under the wave conditions in different sea areas.The optimal form of float array is obtained,which provides certain theoretical basis for the integration of wave platform and float under real sea conditions.