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#12: Wind Heeling Moment options
GHS has the ability to compute wind heeling moments using a method
which produces more realistic results in some cases.
The traditional "lateral plane" method works well when the model is
constructed appropriately. Since any overlap of hull or superstructure
model elements results in a doubling of the wind plane area where the
overlap occurs, the model must be constructed to avoid such overlapping
components. Otherwise the resulting heeling moments will be larger than
The new "Band" method avoids this problem as it combines the contributions
from all model components within each model part into one lateral area before
computing the wind force. This allows it to produce realistic results even
when the overlapping areas are very substantial.
Following is a list of Band-method advantages.
- Shielding between model components is accounted for when they are
in the same model part.
- When no shielding is desired between certain model elements they can be
represented as separate parts.
- Wind heeling moments at heel angles other than zero are realistic.
- Wind Heeling moments at any axis angle are available.
- The wind pressure profile as a function of height above the water surface
is sampled at smaller intervals.
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