A symmetric hull margin line not snapping correct

Hello,

I'm having a problem in maxsurf to calculate the stability of a ship with a pontoon connected to the vessel on only one side.

Error: "GZ curve criteria: GZ area between limits type 1 - standard - Upper heel angle bound less than lower bound"

the margin line also mirrors to the side without the pontoon as if ther is a ponton. 

What kan be the problem?

Parents
  • Can you post some images of your model. That Margin line could be the problem.

    So the warning message is telling you the lower bound (typically measured from equi, 0 degrees or similar) is a larger value than the upper bound (typically measured to deck edge immersion, DF point etc, max GZ).

    So if your Margin Line is not in the correct location and part of it is underwater at the upright condition, then the value of the upper bound will be lower than lower bound.

    The first check is to make sure that the margin line doesn't dive downwards at the bow or the stern. This can happen with sloping transoms. If it does, manually adjust the margin line points (or delete them)

    Asymmetric margin lines aren't supported. But you really only need the margin line on the side being immersed. So if you are heeling your vessel to starboard, set the margin line correctly for that direction of heel.

    Regards,

    James

Reply
  • Can you post some images of your model. That Margin line could be the problem.

    So the warning message is telling you the lower bound (typically measured from equi, 0 degrees or similar) is a larger value than the upper bound (typically measured to deck edge immersion, DF point etc, max GZ).

    So if your Margin Line is not in the correct location and part of it is underwater at the upright condition, then the value of the upper bound will be lower than lower bound.

    The first check is to make sure that the margin line doesn't dive downwards at the bow or the stern. This can happen with sloping transoms. If it does, manually adjust the margin line points (or delete them)

    Asymmetric margin lines aren't supported. But you really only need the margin line on the side being immersed. So if you are heeling your vessel to starboard, set the margin line correctly for that direction of heel.

    Regards,

    James

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