Topography optimization of frequency using stacked plies

mdrehmer
mdrehmer Altair Community Member
edited October 2020 in Community Q&A

Hello,

 

I'm having troubles setting up a topography optimization using plies. The model is a heatshield with 3 different layers(thickness) and Im using PCOMPP card as property to them. 

I believe that the optimization settings are correct, because I had already used the same settings in a previous single layer model and it went ok. 

But when I try using stacked layers something goes wrong. Im getting the following error:

 

*** ERROR #  79 ***
 DTPG data does not create any DVGRID data.
 There are no free referenced GRIDs.
 There may be no elements associated with the PSHELL data.
 LOAD or BOTH may be specified and all grids may be loaded.
 BC, SPC, or BOTH may be specified and all grids may be SPCed.

 

Any thoughts??

If there is some paper relating modal+plies+optimization that can be provided I'll appreciate.

Thanks in advance.

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Answers

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited May 2018

    Hi @mdrehmer

     

    Is it possible to share the model file with us?

    Please use the file transfer link in my signature to share the model file

     

     

  • mdrehmer
    mdrehmer Altair Community Member
    edited May 2018

    Hello Prakash,

     

    Model file shared. It will be great if you can give me an idea of the problem today.

    Thanks!

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited May 2018

    Hi @mdrehmer

     

    I have shared a modified file with you. 

     

    Please run the same and check the results. 

  • mdrehmer
    mdrehmer Altair Community Member
    edited May 2018

    It worked! I saw that the problem was in the 'entity type' of Topography design variable right? As soon as it was changed to STACK the optimization runs properly.

    Thanks Prakash, problem solved.

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited May 2018

    @mdrehmer

     

    Altair Forum User said:

    It worked! I saw that the problem was in the 'entity type' of Topography design variable right? As soon as it was changed to STACK the optimization runs properly.

    Thanks Prakash, problem solved.

    Correct :)/emoticons/default_smile.png' srcset='/emoticons/smile@2x.png 2x' title=':)' width='20'> 

  • mdrehmer
    mdrehmer Altair Community Member
    edited May 2018

    Prakash,

     

    One last question: How can I split the model in 'design areas' and 'non-design areas' using plies? Is it the same way when there's only one single layer?

    Thanks!

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited May 2018

    @mdrehmer

     

    No. Create a different laminate for the non-design area. 

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