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Element quality check between nastran and optistruct

User: "gopal_rathore"
Altair Community Member
Updated by gopal_rathore

Hi,

I am having a Nastran solver deck and want to run it on optistruct solver. When I see element quality criteria in Nastran , it shows max. as 0.008 but the same in Nastran shows 51.55

 

How these values can interpreted as both decks solvers showing different values.

Any methodology to understand this

 

Thank you

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    User: "QuyNguyenDai"
    Altair Community Member
    Updated by QuyNguyenDai

    Which criteria???

    User: "gopal_rathore"
    Altair Community Member
    OP
    Updated by gopal_rathore

    Warpage, min. and max. angles of tria and qaud element

    User: "Altair Forum User"
    Altair Employee
    Updated by Altair Forum User

    When I see element quality criteria in Nastran , it shows max. as 0.008 but the same in Nastran shows 51.55

    I am sorry, in Nastran it shows as 0.008 and in HM with OptiStruct profile it shows as 51.55, is that correct??

    User: "gopal_rathore"
    Altair Community Member
    OP
    Updated by gopal_rathore

    Yes,

    This is the same thing it shows. 

    User: "gopal_rathore"
    Altair Community Member
    OP
    Updated by gopal_rathore

    Hi,

    Any update on this

    User: "Altair Forum User"
    Altair Employee
    Updated by Altair Forum User

    Hi Gopal,

     

    I will check with experts about this. 

    User: "Altair Forum User"
    Altair Employee
    Updated by Altair Forum User

    Hi Gopal,

     

    Can you let me know which criteria are you looking at?

     

    You have given numbers of 0.008 and 51.5, which quality parameter is it for?

    User: "Altair Forum User"
    Altair Employee
    Updated by Altair Forum User

    You can refer this on how element quality is calculated. 

    Unable to find an attachment - read this blog

    User: "gopal_rathore"
    Altair Community Member
    OP
    Updated by gopal_rathore

    Hi Gopal,

     

    Can you let me know which criteria are you looking at?

     

    You have given numbers of 0.008 and 51.5, which quality parameter is it for?

    Hi,

    This is for warpage

    User: "gopal_rathore"
    Altair Community Member
    OP
    Updated by gopal_rathore

    Hi, 
    Anything on above points

    User: "Altair Forum User"
    Altair Employee
    Updated by Altair Forum User

    Hi Gopal.

     

    Can you share a sample model with difference in warpage between Nastran and OptiStruct?

    User: "gopal_rathore"
    Altair Community Member
    OP
    Updated by gopal_rathore

    Hi,

    There is one tool in 17 version in Hyperview> Preferences>NVH utilities to understand the identification of global and local modes. It talks about setting a criteria based on percentage range for identification. I wanted to know how it is setting up this criteria 

     

    I have attached image for reference

    <?xml version="1.0" encoding="UTF-8"?>global modes -NVH utilities.JPG

    User: "gopal_rathore"
    Altair Community Member
    OP
    Updated by gopal_rathore

    Hi,

    There is one tool in 17 version in Hyperview> Preferences>NVH utilities to understand the identification of global and local modes. It talks about setting a criteria based on percentage range for identification. I wanted to know how it is setting up this criteria 

     

    I have attached image for reference

    <?xml version="1.0" encoding="UTF-8"?>global modes -NVH utilities.JPG

     

     

    Sorry, this content is wrongly posted.