Wind Loads

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Wind Loads

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Theory

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)

 

Relevant Keywords

•*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