Vessel wind loads are calculated using:
(1)
where:
•,
and
are the wind coefficients in surge, sway and yaw respectively for an equivalent wind incidence of
• is the air density
• is the transverse area of the vessel which is exposed to wind action
• is the longitudinal area of the vessel which is exposed to wind action
• is the equivalent wind velocity
The equivalent wind incidence is obtained using:
(2)
where:
• is the (global) wind velocity
• is the wind direction as defined in the Wind and Current Directions figure.
The equivalent wind velocity is given by:
(3)
•*MOORED VESSEL is used to define a moored vessel and its associated properties. Specifically, the TYPE=GEOM inputs are used to specify vessel geometrical data such as draft, beam, length between perpendiculars etc.
•*WIND is used to specify wind loading.
•*WIND COEFF is used to specify wind coefficients used to determine the wind loading on a floating body or moored vessel.
If you would like to see an example of how these keywords are used in practice, refer to D01 - Moored Vessel