Collaboration diagram for Wind force:

Wind force and yaw moment on a vessel from Fourier series in the apparent wind angle. The apparent wind is the wind velocity minus the vessel velocity in the horizontal plane (the vertical velocity is not used). The angle \( \psi \) is the angle from the vessel x axis to the apparent wind, in (-pi, pi]. For each of x, y and n, a coefficient is

\[ C = A_0 + \sum_{i=1}^{N} A_i \cos(i\psi) + B_i \sin(i\psi) \]

where N is the number of values of the FourierA array of that direction. The force and moment are then

\[ X = \tfrac{1}{2}\rho A_F |v|^2 C_x,\quad Y = \tfrac{1}{2}\rho A_L |v|^2 C_y,\quad N = \tfrac{1}{2}\rho A_L L |v|^2 C_n \]

with \( A_F \) the front area, \( A_L \) the lateral area, \( L \) the characteristic length and \( \rho \) FluidDensity. The moment about x and y is \( (z_p Y, z_p X) \) with \( z_p \) = VerticalPressureCenter, and the vector is rotated to NED with the quaternion. Without 360DegData, Y and N change sign when that angle is negative (the data are then used for angles 0 to 180 degrees only).

Input ports

Output ports

Configuration parameters