Objectives To optimize the energy capture efficiency of the rocker-type wave energy converter,the effect of the platform strut diversion scheme and shape of the buoy on the energy capture is studied.
Methods Firstly,the hydrodynamic model of the buoy motion is established.Then,the hydrodynamic characteristics of different finned floats under different diversion schemes of the platform strut,frequency domain parameters such as the added mass,the radiation damping,the wave excitation forces,and the response amplitude operators,as well as time domain parameters such as displacement, velocity, acceleration and excitation force,are calculated by AQWA software and analyzed. Finally,the energy capture width ratio of different finned floats for different shunt schemes of the platform strut are investigated.
Results The results show that different platform strut shunt schemes have less effect on the frequency domain parameters of the finned floats,little effect on the float motion displacement of time domain parameters, but a large effect on the motion period.Energy capture is optimal at a fin angle of 100° in the two-pillar manifold scheme.
Conclusions Based on the proposed simulation numerical model, the hydrodynamic response of multi-degree-of-freedom fin-shaped floats in wave motion can be simulated accurately, which can provide references for the optimized design of the float shape of the oscillating float-type wave energy generation platform.
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