Time step error

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

Hi,

I am facing the following issues with Radioss run - Quasi Static analysis.
 
1)  Without /DT/INTER/DEL in Engine file , the run has been stopped due to min time step error. 
image.png.4bc6e97c86e88f6d509d46615a8fe6c8.png
 
 
2) With /DT/INTER/DEL in Engine file the mass scaling DM/M  is increasing gradually till 30% from 3.2%
 
Let me know for comments to avoid this error
 
 
Regards,
 
Arul
 
 

 

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Answers

  • gopal_rathore
    gopal_rathore Altair Community Member
    edited May 2018

    Hi,

    The issue seems to be in interface 1 only , Kindly check penetrations if any . what is the type of contact , parameters used and also if any image can be shared for more idea of the model

  • Arul
    Arul Altair Community Member
    edited May 2018

    Hi ,

     

    Pls find the interface details

     

    image.png.d0bd6f62cfabb61ccdc13bd92ea92614.png

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

    Hi,

    The interface is creating issue in your case. I presume there are penetrations in your interface, check and correct the same. You can try also with a small Gapmin value.

    With /DT/INTER/DEL check in HyperView how the simulation works, and also what causes for time step drop. Remove/DT/NODA for this case and run.

     

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