3. Wind calculation
3-1 Calculation
method
Added resistance due to winds,, is calculated by the following formula
on the basis of the mean wind speed and wind
direction.
In heading winds the drag coefficient, , is derived as following, for example,
where:
: air density
: projected transverse area above water
line,
: mean wind speed
: ship breadth,
: projected lateral area above the summer load line,
: length overall,
: distance from the midship section to the center of
projected lateral area;
a positive value of means that the
center of the projected lateral area
is located ahead of the midship section.
Reference
[1]
T. Fujiwara, M. Ueno and Y. Ikeda: Cruising performance of a large passenger
ship
in heavy sea, Proceedings of the Sixteenth International Offshore and
Polar
Engineering Conference, Vol. III, pp.304-311, 2006.