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采用CFD方法计算水动力系数,可以得到形状复杂浮体的水动力系数函数,但效率不高.为了提高CFD方法的计算效率,节省计算时间,提出了一个同时计算多个频率水动力系数值的方法.采用Fluent软件建立数值波浪水池,在水池中央设置一刚性浮体,通过在浮体上施加多个频率的谐波组合位移,辐射兴波引起的浮体上的水压力也具有与位移相同的频率成分.采用Fourier正弦和余弦变换将各频率成分的兴波压力分解开,从而可通过一次CFD计算,得到多个频率下的水动力系数值.最后,对一个共振式波能装置的浮体进行了水动力系数计算,算例结果表明该方法有较高的精度,可以满足工程需求.“,”The computer fluid dynamics (CFD) method can be used to calculate the hydrodynamic coefficients;so that hydrodynamic coefficients function for complex shape of the float can be obtained.However,this method is computationally expensive.In order to improve the computational efficiency of the CFD method,saving computing time,a simultaneously computational method for hydrodynamic coefficients of multiple frequencies is put forward.We can use FLUENT software to establish a numerical wave tank,set a rigid floating body in the central tank;when the displacement of harmonic combination of multiple frequencies applied to the floating body,water pressure on the float caused by the radiation wave also has the same displacement frequency component.Then we use Fourier sine and cosine transforms to resolve the pressure of each frequency component;so that the hydrodynamic coefficient values of the plurality of frequencies can be obtained through once CFD calculation.Finally,a floating body of resonance wave energy device is calculated for hydrodynamic coefficients.Numerical results show that this method has high accuracy to meet the engineering requirements.