ERROR % 0 to negative

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

Hi,

I am solving a model in RADIOSS and I observed the ERRor % is jumping from 0 to negative value. From 0 it is moving to -0.1% and still it is running, now with -5.3%. Should I kill the Solver and check the Model? Could anyone tell where I would have done the mistake?

 

 

NC=    3921 T= 1.1156E+00 DT= 1.9285E-04 ERR=  0.0% DM/M= 6.3869E-02
 ELAPSED TIME=       3372.63 s  REMAINING TIME=     298939.30 s
 NC=    3922 T= 1.1158E+00 DT= 1.9286E-04 ERR=  0.0% DM/M= 6.3869E-02
 ELAPSED TIME=       3373.47 s  REMAINING TIME=     298961.49 s
 NC=    3923 T= 1.1160E+00 DT= 1.9285E-04 ERR= -0.1% DM/M= 6.3869E-02
 ELAPSED TIME=       3374.31 s  REMAINING TIME=     298983.67 s
 NC=    3924 T= 1.1162E+00 DT= 1.9286E-04 ERR= -0.1% DM/M= 6.3869E-02
 ELAPSED TIME=       3375.15 s  REMAINING TIME=     299006.20 s

 

 

 


 NC=    7226 T= 1.6401E+00 DT= 1.4054E-04 ERR= -5.3% DM/M= 6.3956E-02
 ELAPSED TIME=       6447.63 s  REMAINING TIME=     386681.22 s
 

Tagged:

Answers

  • pohan
    pohan Altair Community Member
    edited October 2017

    You can find somethings here

     

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited October 2017

    Hi Ushay,

    The energy error percentage is the parameter that checks the energy conservation during each numerical cycle and it is computed by RADIOSS is a percentage. If the energy error is negative it means that some energy has been dissipated.Normally the energy error should be less than 15% at the end of computation but if the model undergoes high plastic deformation the energy error can increase. As of now the energy error looks fine in your model and I recommend you to continue the run.

  • Ushay
    Ushay Altair Community Member
    edited October 2017

    Thanks George and Pohan

Categories