Simcenter 3D Solutions Meaning of step logs of RecurDyn .msg file

2021-10-06T23:27:10Z
Simcenter 3D

Summary


Details

--------------- 

RecurDyn outputs .msg file. 

e.g.It contains a section as shown below.

 TIME STEPSIZE A_DELNRM NJAC NRES ANRF AINTF 

 ======================================================================== 

 1.00000E-03 1.00000E-03 0.00000E+00 2 6 0 0 

 1.00000E-01 1.00000E-03 0.00000E+00 283 683 0 0 

 1.99000E-01 1.00000E-03 0.00000E+00 580 1376 0 0 

 2.98000E-01 1.00000E-03 0.00000E+00 877 2069 0 0 

 3.97000E-01 1.00000E-03 0.00000E+00 1174 2762 0 0

What are the meaning of the terms mentioned in step log file

Solution

 RecurDyn outputs .msg file. 

e.g.it contains a section as shown below

 TIME STEPSIZE A_DELNRM NJAC NRES ANRF AINTF 

 ======================================================================== 

 1.00000E-03 1.00000E-03 0.00000E+00 2 6 0 0 

 1.00000E-01 1.00000E-03 0.00000E+00 283 683 0 0 

 1.99000E-01 1.00000E-03 0.00000E+00 580 1376 0 0 

 2.98000E-01 1.00000E-03 0.00000E+00 877 2069 0 0 

 3.97000E-01 1.00000E-03 0.00000E+00 1174 2762 0 0

Here is the meaning of terms.They are related to solver processing.

o A_DELNRM: The Accumulated Total Norm

o NJAC: The Total Number of Jacobian Evaluations

o NRES: The Total Number of Residual Evaluations

o ANRF: The Accumulated Total Number of Newton Raphson Failures (The Maximum 

Iteration is 10 in RecurDyn.)

o AINF: The Accumulated Total Number of Integration Failures (During the 

Newton-Rhapson Iterations, if the total norm of the current step is greater 

than that of the previous step, RD counts this case as the number of 

Integration Failure.)

Notes

KB Article ID# PL7007654

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