refined mesh
Hi,
I am new in Altaír Simlab. I am currently doing my final degree work and I’m using Altair SimLab to carry out a linear static study to obtain deformations in a planetary system. My problem comes when I want to refine the mesh. I have seen in different videos that it exists a method to create automatic refining. Could you help me by explaining how to apply this method? Manually refining usually causes me problems when I calculate again.
I tried to create a response but when I'm going to check the convergence always appears this message.
Thanls a loot,
Sergi Valdezate
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Answers
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Hi,
In SimLab, we have convergence study tool. This will automatically do the mesh refinement on the high stress regions.
Please refer the attached video for the reference.
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You can create 2 mesh control to refine 3D mesh:
1) Region mesh control with smaller element size
2) Create Body Mesh control.
Then generate surface mesh >> Solid mesh (You should choose small grow rate = 1.1 or 1.2, default = 2)
I think convergence study tools are just used for some 'nice' & 'Easy' cases.
If high stress is near constraints, how to refine automatically?
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Hello again,
First of all thank you so much for your quick reply. I have been testing the automatic refinement and I’ve had problems when I used it in assembly. When the mesh is refined it loses the constrains. I think that this happens because the program generates a new mesh and the constrains lose the reference (attached images). Can you refine in a constrain? This don’t happen when I do it in a single piece.
According to your answer Alpha. I use mesh controls but these apply at the begin of the study. If I want to refine the mesh once the study is finished, will I have to generate the entire study again? When applying re-mesh, I get quality mesh errors as if its quality was not good.
Thanks so much again,
Sergi Valdezate
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Can you share your model? Perphaps we have to use group template and automate the process.
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Hi again, yes of course. I attached the model in the message. Sorry for my late reply.
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Can you share the CAD data (parasolid) as well because SL directly access to this file. SL does not create their own CAD data.
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Hi Sergi,
Based on your model, I measure and create the CAD data (parasolid) by ST inspire and run successfully as below attached.
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Hi Alpha,
Thank you so much for your help and your time. Your model goes perfect but, when I generate a new model there is something I do wrong and I don't know what it is, that's why the convergence study does not perform well for me. Attached video with the steps I follow (I have to uploaded in YouTube to be able to pass). If I use your model it refines me without problems but I need to work with other projects and I needed to know how to do it.
One difference that I notice is that in my model, when I check the convergence, doesn’t asks me for the geometry and I don’t know why.
Thank you very much again,
Sergi Valdezate
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Hi again Alpha,
I have the same problem with your model. I didn’t see yesterday but when I make the convergence study some constrains disappear, and I don’t know why (in these case the contact constrains) Have you the same problem?
Anyway, the convergence graph appears to me but it is not correct because it loses the restrictions.
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