Converting moses modeler to executive

Hello Everyone.

I am new into moses. I have save my mesh into dat.file and use it as model data in analysis.

When I want to use it in moses executive, my model didn't appear properly. 

Can you tell me how to fix this?

Thank You,

Michael

Parents Reply
  • Hi Michael,

    Please refer to the MOSES manual under the "panel" definition.

    "The order of the definition of the vertices should be clockwise when the panel is viewed from outside of the body. In other words, the normal to the surface, when defined by the right-hand rule, should point into the body."

    In the modeler, you can alter the direction of those panels that are not following the convention. Before exporting to MOSES, a good practice is to verify your model by using the "Verify" tab.

    In order to convert from MOSES modeler to MOSES geometry, you need to go to the "Save" tab and save the mesh in the working folder (where your CIF file is located). By default, it is saved as "_Mesh.dat" file. However, you can change its name to "model.dat" or any other name. If your CIF file is named "motion.cif" and you save your exported file as "motion.dat", then MOSES will automatically read it after the INMODEL command.

    Let me know if you have further questions.

    Thanks, 

    Rahul Kanotra

    Answer Verified By: Michael S 

Children
  • Hi Rahul, 

    Thank's for answering my question.

    I have another question. When running stability simulation I got a warning "PIECE BW2P IS NOT ClOSED" and "NO SOLUTION TO BALLASTING PROBLEM". How to fix part or tank that is not closed and what solution to my ballasting problem?

    Thank you

    Michael

  • Hi Michael,

    I don't have your files, but from what you mentioned, it looks like your compartment BW2P has "holes" in it, meaning it is not completely closed. You will need to check if you have correctly defined the closed surface. If the model was made in the modeler, you can check it there, or otherwise, you can inspect it in the MOSES executive "model view" window.

    Regarding your other warning, it means that with the tanks you have chosen (in &cmp_bal), they are not enough to find a ballasting solution to your problem. You may want to add more tanks and/or use some other tanks than the ones you have chosen.

    I hope this helps.

    Thanks,

    Rahul

    Answer Verified By: Michael S 

  • Dear rahul, ive read your reply and interested to know if you managed the get a good mesh when directly exporting to executive? And it seems that the area around the bilge keels seems to be off shaped if it mesh in single body? Compare to if I manually model with pgen -circ command. Do i need a model with multiple slice surface in order to have good result? Thanks

  • Dear Naim,

    When performing hydrodynamic calculations, it is necessary to define a single enclosed piece to represent the hull. If multiple pieces are used to define the geometry, the hydrodynamic results will simply be incorrect. The users are warned about this in the MOSES manual as well.

    If you have created the mesh in the MOSES modeler, you have several options to refine/remesh it. In MOSES itself, you can use the &parameter -m_dist command to refine the mesh. Additionally, in MOSES, you can access panel summaries in the &summary menu.

    This menu allows you to check the "badness" of the panels, as defined in the MOSES manual.

     

    &summary 
        compart_sum panels 
    end_&summary 

    I hope this helps. All the best with your analysis. 

    Thanks 

    Rahul