Problem when creating complex tank in maxsurf stability

Discussion in 'Software' started by Nann, Feb 23, 2018.

  1. Nann
    Joined: Feb 2018
    Posts: 3
    Likes: 0, Points: 1
    Location: Indonesia

    Nann New Member

    Hello i'm new at this forum
    I've working a project to do stability analysis of a 163 m tanker ship with maxsurf. I've made the all of the tank as internal structure with modeler and everything seems right.

    But a problem occured when i was creating with those boundary surfaces in maxsurf stability. I'm pretty sure i've entered all of tank surfaces. But after i updated the loadcade.. The result was not the same as surface created in modeler. I have no idea with this problem. (I'v attached some picture)

    Thanks for your help. I'm sorry for my poor english too.
     

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  2. TANSL
    Joined: Sep 2011
    Posts: 5,501
    Likes: 152, Points: 73, Legacy Rep: 300
    Location: Spain

    TANSL Senior Member

    Try using more sections to define this tank. ???
    If this is not possible, for stability calculations, replace the tank with a parallelepiped one, without chafers on the edges. The volume will be very similar, the position of the CoG and the correction for free surfaces almost the same.
     
  3. Nann
    Joined: Feb 2018
    Posts: 3
    Likes: 0, Points: 1
    Location: Indonesia

    Nann New Member

    Thanks for the answer. But what do you mean with using more section? do i need to use more surface to define this tank?
    I spent the whole day just to make those tanks, it's impossible to replace them :(
    I wonder why this problem happened, i've created 14 tanks, but only 4 tanks has this problem. (i uploaded pictures). I've also tried to "re-make" those tank with new surface, it doesn't work.
     

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  4. TANSL
    Joined: Sep 2011
    Posts: 5,501
    Likes: 152, Points: 73, Legacy Rep: 300
    Location: Spain

    TANSL Senior Member

    I was referring to using these options although I am not sure they will help much.
    Snap4.jpg
    Could you upload your model to analyze it?
     
  5. Nann
    Joined: Feb 2018
    Posts: 3
    Likes: 0, Points: 1
    Location: Indonesia

    Nann New Member

    Hi TANSL

    Sorry for replying late. I've tried to recalculate the section with higher precision, and you were right! I needs at least 200 sections to define the surface.
    Thanks for your solution, TANSL. It helped my research so much and I really apreciate it :)
     

  6. TANSL
    Joined: Sep 2011
    Posts: 5,501
    Likes: 152, Points: 73, Legacy Rep: 300
    Location: Spain

    TANSL Senior Member

    You're welcome. At your disposal for what you may need, if it is within my knowledge and experience.
     
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