For the existing calculations of the wave load are most based on the linear wave theory, a more accurate STOKESwave is used to calculate the wave load in this paper.
When pump power increases farther, second Stokeswave is generated, then first Stokeswave is saturated, and residual pump wave power starts to be increasing linearly.
The results indicate that the wave drag forces calculated by linear wave theory are larger than those calculated by the third order Stokeswave theory for given waves.