Modal mass participation factors request does not work well in normal modes process
I have tried to request EFFMASS > YES in Process for Normal modes, but there are 2 problems : in the output file after the run, there are no mass participation factors calculated. I have to create the request in Solver tab under Parameter.
The other problem is that once I make a request in Process section, I can not know if it is done properly or not, once I am done with the process, there is nothing saved in the Process tab, so I can not know how to undo it, on which nodes have I requested and so, so this tool is not 100% useful. It was better that it left a trace of the operations requested by user
another question about the Modal participation factors, why is it calculated differently and multiple times in my out file for one simple beam ?
ITERATION 0 (Scratch disk space usage for starting iteration = 1 MB)(Running in-core solution)
Volume = 1.00000E+05 Mass = 7.85000E-04 Generalized GeneralizedSubcase Mode Frequency Eigenvalue Stiffness Mass 1 1 8.348723E+00 2.751692E+03 2.751692E+03 1.000000E+00 1 2 8.370546E+00 2.766097E+03 2.766097E+03 1.000000E+00 1 3 5.229004E+01 1.079438E+05 1.079438E+05 1.000000E+00 1 4 5.244297E+01 1.085761E+05 1.085761E+05 1.000000E+00 1 5 1.465769E+02 8.481857E+05 8.481857E+05 1.000000E+00 1 6 1.471071E+02 8.543332E+05 8.543332E+05 1.000000E+00 1 7 2.880508E+02 3.275654E+06 3.275654E+06 1.000000E+00 1 8 2.894193E+02 3.306852E+06 3.306852E+06 1.000000E+00 1 9 4.784141E+02 9.035822E+06 9.035822E+06 1.000000E+00 1 10 4.814465E+02 9.150732E+06 9.150732E+06 1.000000E+00 1 11 6.241844E+02 1.538103E+07 1.538103E+07 1.000000E+00 1 12 7.195347E+02 2.043917E+07 2.043917E+07 1.000000E+00 2 1 1.165734E-03 -5.364860E-05 -5.364860E-05 1.000000E+00 2 2 8.828066E-04 -3.076741E-05 -3.076741E-05 1.000000E+00 2 3 7.342745E-04 2.128514E-05 2.128514E-05 1.000000E+00 2 4 8.444623E-04 2.815272E-05 2.815272E-05 1.000000E+00 2 5 9.689701E-04 3.706641E-05 3.706641E-05 1.000000E+00 2 6 1.576366E-03 9.810110E-05 9.810110E-05 1.000000E+00 2 7 5.278576E+01 1.100002E+05 1.100002E+05 1.000000E+00 2 8 5.282278E+01 1.101545E+05 1.101545E+05 1.000000E+00 2 9 1.450874E+02 8.310345E+05 8.310345E+05 1.000000E+00 2 10 1.453309E+02 8.338264E+05 8.338264E+05 1.000000E+00
MODAL PARTICIPATION FACTORS FOR SUBCASE 1 RIGID BODY MODES BASED ON REFERENCE POINT AT ORIGIN OF BASIC COORDINATE SYSTEM---------------------------------------------------------------------------------Mode Frequency X-TRANS Y-TRANS Z-TRANS X-ROTAT Y-ROTAT Z-ROTAT--------------------------------------------------------------------------------- 1 8.349E+00 -6.851E-16 2.192E-02 -4.214E-11 -2.107E-10 3.066E-08 1.595E+01 2 8.371E+00 -1.699E-17 4.216E-11 2.191E-02 1.096E-01 -1.594E+01 3.067E-08 3 5.229E+01 -8.708E-17 -1.214E-02 -1.211E-12 -6.056E-12 2.565E-10 -2.550E+00 4 5.244E+01 7.671E-19 1.208E-12 -1.214E-02 -6.071E-02 2.560E+00 2.525E-10 5 1.466E+02 3.297E-16 -7.105E-03 8.622E-15 4.333E-14 -6.622E-13 -9.136E-01 6 1.471E+02 4.567E-18 -9.816E-15 -7.110E-03 -3.555E-02 9.201E-01 -1.325E-12 7 2.881E+02 1.847E-16 -5.064E-03 2.777E-15 1.387E-14 -2.360E-13 -4.682E-01 8 2.894E+02 2.704E-18 2.807E-15 5.073E-03 2.537E-02 -4.730E-01 2.550E-13 9 4.784E+02 2.676E-16 3.923E-03 9.790E-16 4.820E-15 -6.830E-14 2.848E-01 10 4.814E+02 1.995E-18 8.108E-16 -3.936E-03 -1.968E-02 2.884E-01 2.926E-14 11 6.242E+02 7.186E-17 1.664E-17 8.233E-15 -1.261E-01 -6.724E-12 -1.920E-14 12 7.195E+02 -4.356E-16 3.195E-03 -1.211E-15 -4.858E-15 1.750E-14 1.919E-01SUBCASE TOTAL -3.609E-16 4.726E-03 3.797E-03 -1.071E-01 -1.265E+01 1.249E+01---------------------------------------------------------------------------------
MODAL PARTICIPATION FACTORS RATIOS FOR SUBCASE 1 RIGID BODY MODES BASED ON REFERENCE POINT AT ORIGIN OF BASIC COORDINATE SYSTEM---------------------------------------------------------------------------Mode Frequency X-TRANS Y-TRANS Z-TRANS X-ROTAT Y-ROTAT Z-ROTAT--------------------------------------------------------------------------- 1 8.349E+00 1.000E+00 1.000E+00 1.923E-09 1.671E-09 1.923E-09 1.000E+00 2 8.371E+00 2.481E-02 1.923E-09 1.000E+00 8.691E-01 1.000E+00 1.923E-09 3 5.229E+01 1.271E-01 5.540E-01 5.528E-11 4.804E-11 1.609E-11 1.599E-01 4 5.244E+01 1.120E-03 5.508E-11 5.541E-01 4.816E-01 1.606E-01 1.583E-11 5 1.466E+02 4.812E-01 3.241E-01 3.935E-13 3.437E-13 4.154E-14 5.729E-02 6 1.471E+02 6.666E-03 4.478E-13 3.245E-01 2.820E-01 5.771E-02 8.306E-14 7 2.881E+02 2.697E-01 2.310E-01 1.267E-13 1.100E-13 1.480E-14 2.936E-02 8 2.894E+02 3.947E-03 1.281E-13 2.315E-01 2.012E-01 2.966E-02 1.599E-14 9 4.784E+02 3.907E-01 1.790E-01 4.468E-14 3.824E-14 4.284E-15 1.786E-02 10 4.814E+02 2.912E-03 3.699E-14 1.796E-01 1.561E-01 1.809E-02 1.835E-15 11 6.242E+02 1.049E-01 7.589E-16 3.757E-13 1.000E+00 4.218E-13 1.204E-15 12 7.195E+02 6.359E-01 1.457E-01 5.529E-14 3.854E-14 1.098E-15 1.203E-02---------------------------------------------------------------------------
MODAL EFFECTIVE MASS FOR SUBCASE 1 RIGID BODY MODES BASED ON REFERENCE POINT AT ORIGIN OF BASIC COORDINATE SYSTEM---------------------------------------------------------------------------Mode Frequency X-TRANS Y-TRANS Z-TRANS X-ROTAT Y-ROTAT Z-ROTAT--------------------------------------------------------------------------- 1 8.349E+00 4.694E-31 4.806E-04 1.776E-21 4.439E-20 9.401E-16 2.543E+02 2 8.371E+00 2.888E-34 1.777E-21 4.801E-04 1.200E-02 2.542E+02 9.404E-16 3 5.229E+01 7.583E-33 1.475E-04 1.467E-24 3.668E-23 6.581E-20 6.504E+00 4 5.244E+01 5.884E-37 1.458E-24 1.474E-04 3.685E-03 6.554E+00 6.374E-20 5 1.466E+02 1.087E-31 5.049E-05 7.434E-29 1.877E-27 4.385E-25 8.347E-01 6 1.471E+02 2.086E-35 9.636E-29 5.055E-05 1.264E-03 8.467E-01 1.754E-24 7 2.881E+02 3.413E-32 2.565E-05 7.713E-30 1.923E-28 5.568E-26 2.192E-01 8 2.894E+02 7.311E-36 7.881E-30 2.574E-05 6.434E-04 2.237E-01 6.503E-26 9 4.784E+02 7.163E-32 1.539E-05 9.585E-31 2.323E-29 4.665E-27 8.110E-02 10 4.814E+02 3.980E-36 6.574E-31 1.549E-05 3.873E-04 8.318E-02 8.560E-28 11 6.242E+02 5.165E-33 2.768E-34 6.778E-29 1.589E-02 4.521E-23 3.688E-28 12 7.195E+02 1.898E-31 1.021E-05 1.467E-30 2.360E-29 3.062E-28 3.683E-02SUBCASE TOTAL 8.867E-31 7.298E-04 7.193E-04 3.387E-02 2.619E+02 2.620E+02---------------------------------------------------------------------------
MODAL EFFECTIVE MASS FRACTION FOR SUBCASE 1 RIGID BODY MODES BASED ON REFERENCE POINT AT ORIGIN OF BASIC COORDINATE SYSTEM---------------------------------------------------------------------------Mode Frequency X-TRANS Y-TRANS Z-TRANS X-ROTAT Y-ROTAT Z-ROTAT--------------------------------------------------------------------------- 1 8.349E+00 5.979E-28 6.122E-01 2.262E-18 1.131E-18 3.588E-18 9.704E-01 2 8.371E+00 3.679E-31 2.264E-18 6.116E-01 3.058E-01 9.702E-01 3.589E-18 3 5.229E+01 9.659E-30 1.879E-01 1.869E-21 9.345E-22 2.512E-22 2.482E-02 4 5.244E+01 7.496E-34 1.857E-21 1.878E-01 9.389E-02 2.502E-02 2.433E-22 5 1.466E+02 1.385E-28 6.431E-02 9.470E-26 4.783E-26 1.674E-27 3.185E-03 6 1.471E+02 2.657E-32 1.228E-25 6.439E-02 3.219E-02 3.232E-03 6.696E-27 7 2.881E+02 4.348E-29 3.267E-02 9.825E-27 4.899E-27 2.125E-28 8.366E-04 8 2.894E+02 9.314E-33 1.004E-26 3.279E-02 1.639E-02 8.538E-04 2.482E-28 9 4.784E+02 9.125E-29 1.961E-02 1.221E-27 5.919E-28 1.780E-29 3.095E-04 10 4.814E+02 5.070E-33 8.375E-28 1.974E-02 9.869E-03 3.175E-04 3.267E-30 11 6.242E+02 6.579E-30 3.526E-31 8.634E-26 4.048E-01 1.726E-25 1.407E-30 12 7.195E+02 2.418E-28 1.300E-02 1.869E-27 6.012E-28 1.169E-30 1.405E-04SUBCASE TOTAL 1.130E-27 9.297E-01 9.163E-01 8.630E-01 9.996E-01 9.997E-01---------------------------------------------------------------------------
MODAL PARTICIPATION FACTORS FOR SUBCASE 2 RIGID BODY MODES BASED ON REFERENCE POINT AT ORIGIN OF BASIC COORDINATE SYSTEM---------------------------------------------------------------------------------Mode Frequency X-TRANS Y-TRANS Z-TRANS X-ROTAT Y-ROTAT Z-ROTAT--------------------------------------------------------------------------------- 1 0.000E+00 -4.621E-04 1.831E-02 -1.914E-06 -1.558E-05 9.265E-04 3.022E+00 2 0.000E+00 8.521E-04 -2.118E-02 -3.435E-06 -1.443E-05 3.681E-03 -1.590E+01 3 7.343E-04 1.038E-05 8.461E-08 2.746E-02 1.448E-01 -1.219E+01 -8.036E-04 4 8.445E-04 -2.092E-05 -6.092E-06 5.371E-03 2.470E-02 -1.064E+01 -4.426E-03 5 9.690E-04 -2.800E-02 -9.469E-04 6.170E-06 2.814E-05 3.503E-03 -3.935E-01 6 1.576E-03 1.453E-06 -1.086E-06 1.377E-03 -1.330E-01 -4.839E-01 -4.086E-04 7 5.279E+01 -1.201E-13 -1.044E-12 -3.995E-15 -2.086E-14 2.794E-12 5.275E-10 8 5.282E+01 -2.491E-15 3.883E-16 1.805E-12 1.118E-11 -9.251E-10 4.554E-13 9 1.451E+02 -3.970E-14 -1.284E-13 -3.332E-16 -2.442E-15 2.575E-13 -1.340E-11 10 1.453E+02 2.677E-17 -1.796E-16 3.000E-14 2.739E-15 3.071E-11 -7.473E-14SUBCASE TOTAL -2.762E-02 -3.828E-03 3.421E-02 3.646E-02 -2.330E+01 -1.328E+01---------------------------------------------------------------------------------
MODAL PARTICIPATION FACTORS RATIOS FOR SUBCASE 2 RIGID BODY MODES BASED ON REFERENCE POINT AT ORIGIN OF BASIC COORDINATE SYSTEM---------------------------------------------------------------------------Mode Frequency X-TRANS Y-TRANS Z-TRANS X-ROTAT Y-ROTAT Z-ROTAT--------------------------------------------------------------------------- 1 0.000E+00 1.650E-02 8.644E-01 6.969E-05 1.076E-04 7.603E-05 1.901E-01 2 0.000E+00 3.043E-02 1.000E+00 1.251E-04 9.971E-05 3.020E-04 1.000E+00 3 7.343E-04 3.708E-04 3.994E-06 1.000E+00 1.000E+00 1.000E+00 5.055E-05 4 8.445E-04 7.470E-04 2.876E-04 1.955E-01 1.706E-01 8.733E-01 2.784E-04 5 9.690E-04 1.000E+00 4.470E-02 2.247E-04 1.944E-04 2.874E-04 2.475E-02 6 1.576E-03 5.188E-05 5.124E-05 5.014E-02 9.187E-01 3.971E-02 2.570E-05 7 5.279E+01 4.289E-12 4.930E-11 1.455E-13 1.441E-13 2.293E-13 3.318E-11 8 5.282E+01 8.895E-14 1.833E-14 6.573E-11 7.725E-11 7.592E-11 2.864E-14 9 1.451E+02 1.418E-12 6.062E-12 1.213E-14 1.687E-14 2.113E-14 8.429E-13 10 1.453E+02 9.559E-16 8.479E-15 1.092E-12 1.892E-14 2.520E-12 4.701E-15---------------------------------------------------------------------------
MODAL EFFECTIVE MASS FOR SUBCASE 2 RIGID BODY MODES BASED ON REFERENCE POINT AT ORIGIN OF BASIC COORDINATE SYSTEM---------------------------------------------------------------------------Mode Frequency X-TRANS Y-TRANS Z-TRANS X-ROTAT Y-ROTAT Z-ROTAT--------------------------------------------------------------------------- 1 0.000E+00 2.135E-07 3.353E-04 3.663E-12 2.427E-10 8.585E-07 9.130E+00 2 0.000E+00 7.261E-07 4.488E-04 1.180E-11 2.083E-10 1.355E-05 2.527E+02 3 7.343E-04 1.078E-10 7.158E-15 7.543E-04 2.095E-02 1.485E+02 6.457E-07 4 8.445E-04 4.375E-10 3.711E-11 2.884E-05 6.102E-04 1.133E+02 1.959E-05 5 9.690E-04 7.841E-04 8.966E-07 3.807E-11 7.919E-10 1.227E-05 1.548E-01 6 1.576E-03 2.110E-12 1.178E-12 1.896E-06 1.769E-02 2.342E-01 1.669E-07 7 5.279E+01 1.443E-26 1.091E-24 1.596E-29 4.350E-28 7.806E-24 2.783E-19 8 5.282E+01 6.204E-30 1.508E-31 3.259E-24 1.250E-22 8.558E-19 2.073E-25 9 1.451E+02 1.576E-27 1.649E-26 1.110E-31 5.965E-30 6.631E-26 1.796E-22 10 1.453E+02 7.164E-34 3.226E-32 8.998E-28 7.503E-30 9.429E-22 5.585E-27SUBCASE TOTAL 7.850E-04 7.850E-04 7.850E-04 3.925E-02 2.620E+02 2.620E+02---------------------------------------------------------------------------
MODAL EFFECTIVE MASS FRACTION FOR SUBCASE 2 RIGID BODY MODES BASED ON REFERENCE POINT AT ORIGIN OF BASIC COORDINATE SYSTEM---------------------------------------------------------------------------Mode Frequency X-TRANS Y-TRANS Z-TRANS X-ROTAT Y-ROTAT Z-ROTAT--------------------------------------------------------------------------- 1 0.000E+00 2.720E-04 4.271E-01 4.666E-09 6.183E-09 3.277E-09 3.484E-02 2 0.000E+00 9.250E-04 5.717E-01 1.503E-08 5.308E-09 5.171E-08 9.646E-01 3 7.343E-04 1.373E-07 9.119E-12 9.608E-01 5.338E-01 5.668E-01 2.464E-09 4 8.445E-04 5.574E-07 4.728E-08 3.674E-02 1.555E-02 4.323E-01 7.477E-08 5 9.690E-04 9.988E-01 1.142E-03 4.850E-08 2.018E-08 4.683E-08 5.909E-04 6 1.576E-03 2.688E-09 1.501E-09 2.415E-03 4.506E-01 8.939E-04 6.371E-10 7 5.279E+01 1.838E-23 1.390E-21 2.033E-26 1.108E-26 2.980E-26 1.062E-21 8 5.282E+01 7.903E-27 1.921E-28 4.151E-21 3.185E-21 3.267E-21 7.913E-28 9 1.451E+02 2.008E-24 2.101E-23 1.414E-28 1.520E-28 2.531E-28 6.854E-25 10 1.453E+02 9.126E-31 4.110E-29 1.146E-24 1.912E-28 3.599E-24 2.132E-29SUBCASE TOTAL 1.000E+00 1.000E+00 1.000E+00 1.000E+00 1.000E+00 1.000E+00---------------------------------------------------------------------------
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Answers
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Hi Farzad,
You should use PARAM, EFFMASS, YES to request the modal participation factor output. There may be an issue where it was not added through the process manager.
If you use the Process Manager you can always go back to the Model Browser and make sure the cards are all created and set up in the subcase correctly.
In the .out file you for each subcase you have printed out:
Modal participation factors
Modal participation factor ratios
Modal effective mass
Modal effective mass fraction
For an explanation on how these are calculated, see:
https://help.altair.com/hwsolvers/os/topics/solvers/os/param_effmas_bulk_r.htm?zoom_highlight=effmas
Thanks,
Rob H
0
Altair Employee