PART_INERTIA Warning

Altair Forum User
Altair Forum User
Altair Employee
edited October 2020 in Community Q&A

Hi,

 

when i am importing a ls-dyna deck to hm and have *PART_INERTIAs present, i always get the following warning:

 

'Warning:  IRCS value for PART id 11000002 is changed from 0 to 1 i.e the inertias are changed from Global to Local axis and also aligned to the principal axis'

 

I do not want this to happen... how can i change this, so that hm will not modify the inertial properties at all??

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Answers

  • Rahul_P1
    Rahul_P1
    Altair Employee
    edited August 2014

    The *PART_INERTIA IRCS parameter value is changed from 0 to 1. (The inertia components are changed from global to local axis.) 
    This allows inertia components to be automatically updated when *PART_INERTIA elements are translated or rotated. 
     

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited August 2014

    Ok, so there is no way to change this?

  • Rahul_P1
    Rahul_P1
    Altair Employee
    edited August 2014

    I do not see any way to do this currently, I know that the feature to keep IRCS as 0 on import is under development and will be implemented in the future 

  • tinh
    tinh Altair Community Member
    edited August 2014
    Altair Forum User said:

    Hi,

     

    when i am importing a ls-dyna deck to hm and have *PART_INERTIAs present, i always get the following warning:

     

    'Warning:  IRCS value for PART id 11000002 is changed from 0 to 1 i.e the inertias are changed from Global to Local axis and also aligned to the principal axis'

     

    I do not want this to happen... how can i change this, so that hm will not modify the inertial properties at all??

     

     

    If you just don't want hm to change inertial properties, then simply define IRCS as 1 and assign a CID for it

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