Energy ERR Radioss v11 vs v12

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

Hi there,

 

I have an issue with the latest Radioss v12.

 

I am doing analysis on compression spring using radioss block100 format. My model involves shell, solid & rigid elements as well as contact type 7.

 

My problem is towards the end of solver run (spring is getting compressed) i get an increasing energy error (till 99%). This is only happened when i use Radioss v12, whereas Radioss v11 wouldn't give me that problem. Can someone clarify me on this?

 

p/s: I am using the AMS option for time step in bpth solver version.

 

 

Thank you in advance.

 

mfg,

Saifulss

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Answers

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited December 2017

    I'm having the same problem with v12.  One of my models has huge negative spring internal energy, although I can't find negative energy in any of the springs.  Another has huge positive spring energy.  Model results don't look so bad.  Is there a problem with spring energy calculation (and error calculation) in v12?

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited December 2017

    Hi David,

    This is an issue which has been reported and will be fixed in the next version.

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited December 2017

    Thanks for the quick response.  If I change my model over to HW2017 will I still get the same problem?

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited December 2017

    Hi David,

    A similar issue was reported for 2017 version also. In the next updated version this will be fixed.

    If you can provide the files I can run the files in latest version (2017.2 version) and can update you. 

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