| In recent years,with the rapid developing of the concept of deep ocean energy complementarity,scholars focus their attention on the multi-purpose platform that combines wave energy converters with floating platform.Such a combination has the advantages of saving space and cost,sharing mooring,etc.However,the power output and motion responses of the platform are urgently needed to be investigated.Firstly,this paper carried out the experimental investigation on the hydrodynamic performance of a single floater in tank,and the power characteristics and heave motion of the floater are analyzed.The numerical model for coupling cauculation of the performance of the floater and the dynamic characteristics of the hydraulic power take-off(PTO)system are established,and factors that affect the results are discussed in detail,including: turbulence model,mesh size,time step.Subsequently,the method of measuring the secondary efficiency of the system was improved,and the hydrodynamic performance of a single floater and double floaters were investigated in the pool.The influence of the tank wall was explored as well as mutual interference between floaters.The calculation results of the numerical model are basically consistent with the experiment.The power output and motion performance of a single floater under a series of wall distances and its hydrodynamic performance under a larger wave period are further discussed.Finally,the experimental setup and experimental test results of the floating wave energy converter are introduced.The influence of the point-absorber array on the motion performance of the semisubmersible platform and the influence of the movement of the platform on the pointabsorber array are discussed.Based on q-factor,the relationship between the position of each floater in the array and its power output is discussed.Conclusions of the article provides a certain reference for the subsequent design of floating wave energy converters. |
