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

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

## Details

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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

SummaryDetails

### Associated Components

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