Study On The Design And Bench Test Of A Wave Energy Module Buoy Based

The marine buoy is a major instrument for monitoring the parameters of the marine environment.The conventional power supply mode of existing buoys is solar photovoltaic power supply,but solar power supply is limited by day and night.Moreover,with the large-scale and functional diversification of buoys,solar power supply can no longer meet the demand of buoy power.Ocean waves are widely distributed,high energy density,and restricted by day and night.It is a renewable energy that can meet the demand of buoy energy.Therefore,the research of wave energy conversion technology based on ocean buoy has important theoretical significance and engineering application value to solve buoys' long-term,continuous and independent operation.In this paper,based on the analysis of the characteristics of the buoys,a new method based on the buoy ontology is proposed,and the detailed research is carried out.Firstly,AQWA software based on the linear frequency domain boundary element theory is used to obtain the hydrodynamic coefficient and calculating the motion response.Then,based on the similarity theory,and combining with the relevant parameters of the towing tank of Harbin engineering university,the scale ratio was established.And the experimental model of wave energy conversion model was designed and processed to carry out the wave energy module design and experimental research.Wave energy conversion model is mainly composed of mass system,damping system and spring system.In addition,based on the experimental conditions,the motion simulation experiment platform was developed to simulate the different amplitude and different cycles of the buoy in the wave.Experimental scheme design and bench test are carried out for wave energy conversion module model.According to the damping test results,the mechanical structure is optimized and the overall mechanical efficiency of the system is improved.Using the theory of frequency domain,the heave motion simulation experiment is designed for different mechanical parameters(quality system quality,spring elasticity coefficient and damping system damping)combination,and motion simulation platform of movement parameters(cycle and amplitude).Based on the assumption of linear damping,the solution method of system damping is derived to analyze the damping characteristics of the damping system under different working conditions.The mechanical and energy conversion properties of the mechanical structure of the wave energy module are verified by the experiment,and the average efficiency of the mechanical system is calculated.By comparing the experimental and theoretical results,the inertia of other components in the mechanical system except the quality system will lead to great errors in theory and experiment results,so modifying the inertia force in the theoretical model is necessary.By analyzing the experimental results of motion and power,the damping system has a certain nonlinearity.When choosing the damping at resonance frequency as the theoretical analysis of the characteristic damping,the theoretical and experimental results are prospective.By comparing the motion and power curves of different mechanical parameters,the influence of the mechanical parameters on the motion and the power response is analyzed.