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该文采用时域势流模型研究了浮力摆式波浪能装置的水动力性能,通过与频域模型的比较,验证了时域模型,并对比分析了两种典型的PTO阻尼(Power Take-off,能量提取系统)下浮力摆运动和装置转换功率的时间过程、浮力摆摆幅、装置的转换效率等方面,其中恒定阻力矩的选取参照了激振力矩。研究表明:相比采用恒定阻力矩,采用线性阻尼时浮力摆的动力响应更加规则、平稳。两种PTO阻力矩条件下,波浪和摆板参数相同时,装置的最高转换效率基本相同,都能达到100%以上,但转换功率和转换效率的变化趋势有所不同;相应于最佳线性阻尼,采用恒定阻力矩时,装置也存在最佳阻力矩;对于5 s左右的波周期,采用不同类型的PTO阻尼,当装置的转换功率相同时,浮力摆的最大转速基本相同,但最大摆幅和最大阻力矩差别则较大。
In this paper, the temporal dynamics model is used to study the hydrodynamic performance of a buoyant wave energy device. The time domain model is verified by comparison with the frequency domain model. Two typical PTO damping (Power Take-off) , Energy extraction system) under the buoyant pendulum movement and device power conversion time course, buoyant pendulum swing, the conversion efficiency of the device, etc., of which the selection of constant resistance torque reference excitation moment. The results show that the dynamic response of the buoyancy pendulum is more regular and stable than that of the linear pendulum damper. When the parameters of wave and pendulum are the same, the maximum conversion efficiency of the device is basically the same under both PTO resistance moment conditions, both of which can reach more than 100%, but the change trend of conversion power and conversion efficiency are different. Corresponding to the best linear damping , The device also has the best resistance moment when the constant resistance torque is used. For different wave periods of 5 s, different types of PTO damping are used. When the conversion power of the device is the same, the maximum speed of the buoyancy pendulum is basically the same, And the maximum resistance torque difference is larger.