Wind force coefficients and current force coefficients in AQWA.

Hello ,I'm a senior student in Tongji University.Now I have some problems with my simulation Analysis of Offshore Wind Power Platform.
1.How to set the wind force coefficients and current force coefficients in AQWA-Model-Geometry-Foundation.How can I calculate the coefficients and set?
2.In the solve of the hydrodynamic time response,I add the coefficient of the wind.When the spectra of the wind is constant,I just need to set the speed and the direction of the wind.I don't know where is the application point of the wind force and how to choose the spectra of the wind.

I'm very appreciate that you can help me.

 

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