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Fixed BM hydrostatic computation (wrong CoG coordinates)

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This commit is contained in:
Jose Luis Cercos Pita 2012-07-25 19:12:19 +02:00 committed by Yorik van Havre
parent a10ee753e2
commit ec5fb278b0
1 changed files with 3 additions and 3 deletions
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6
src/Mod/Ship/shipHydrostatics/Tools.py
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@ -306,13 +306,13 @@ def BMT(ship, draft, trim=0.0):
B1 = displacement(ship,draft,roll,trim,0.0)[1] B1 = displacement(ship,draft,roll,trim,0.0)[1]
# * M # * M
# / \ # / \
# / \ BM ==|> BM = (BB/2) / tan(alpha/2) # / \ BM ==|> BM = (BB/2) / sin(alpha/2)
# / \ # / \
# *-------* # *-------*
# BB # BB
BB = [B1.x - B0.x, B1.y - B0.y] BB = [B1.y - B0.y, B1.z - B0.z]
BB = math.sqrt(BB[0]*BB[0] + BB[1]*BB[1]) BB = math.sqrt(BB[0]*BB[0] + BB[1]*BB[1])
BM = BM + 0.5*BB/math.tan(math.radians(0.5*roll)) / nRoll # nRoll is the weight function BM = BM + 0.5*BB/math.sin(math.radians(0.5*roll)) / nRoll # nRoll is the weight function
return BM return BM
def mainFrameCoeff(ship, draft): def mainFrameCoeff(ship, draft):