Total model mass is wrong with MITC4+

[victorkemp]

Version 17.0.0

The output is from MEFFMASS in case control.

Example f06 snippets below for the same model with each element type show similar effective modal masses but the Total model mass and Modes % of total mass are completely different. The MIN4's translational mass is correct (0.5148).

MITC4+

                                  E F F E C T I V E   M O D A L   M A S S E S   O R   W E I G H T S
                                                   (in coordinate system        0)
                                     Units are same as units for mass input in the Bulk Data Deck
                                        Reference point is the basic coordinate system origin

             MODE     CYCLES          T1            T2            T3            R1            R2            R3
              NUM
                1  1.665676E+03  9.876636E-19  2.208524E-01  9.612951E-02  5.256272E-08  1.222247E-05  5.267205E-05
                2  2.671479E+03  1.520092E-17  9.541860E-02  2.163042E-01  9.516443E-07  1.460670E-05  1.278447E-05
                3  5.255342E+03  2.673516E-17  2.174726E-03  5.943018E-03  1.838862E-06  1.444819E-06  2.617711E-06
                4  8.866436E+03  1.769504E-16  7.985410E-02  2.261582E-02  3.330763E-09  4.614697E-07  2.922527E-06
                                 ------------  ------------  ------------  ------------  ------------  ------------
                 Sum all modes:  2.198741E-16  3.982998E-01  3.409926E-01  2.846400E-06  2.873546E-05  7.099675E-05
              Total model mass:  2.288000E-01  2.288000E-01  2.288000E-01  1.444950E-04  8.062762E-04  8.665312E-04
        Modes % of total mass*:         0.00%       174.08%       149.04%         1.97%         3.56%         8.19%

MIN4

                                  E F F E C T I V E   M O D A L   M A S S E S   O R   W E I G H T S
                                                   (in coordinate system        0)
                                     Units are same as units for mass input in the Bulk Data Deck
                                        Reference point is the basic coordinate system origin

             MODE     CYCLES          T1            T2            T3            R1            R2            R3
              NUM
                1  1.641138E+03  9.245081E-19  2.183289E-01  9.562259E-02  5.694294E-08  1.265047E-05  5.398617E-05
                2  2.632059E+03  1.369119E-17  9.333803E-02  2.096352E-01  1.194520E-06  1.523849E-05  1.369258E-05
                3  4.773323E+03  2.370977E-17  4.295129E-03  9.708380E-03  2.100381E-06  1.478379E-06  2.727608E-06
                4  8.571857E+03  1.552338E-16  7.848555E-02  2.334590E-02  5.799676E-09  4.651775E-07  2.978253E-06
                                 ------------  ------------  ------------  ------------  ------------  ------------
                 Sum all modes:  1.935593E-16  3.944477E-01  3.383121E-01  3.357644E-06  2.983251E-05  7.338461E-05
              Total model mass:  5.148000E-01  5.148000E-01  5.148000E-01  3.251138E-04  1.814121E-03  1.949695E-03
        Modes % of total mass*:         0.00%        76.62%        65.72%         1.03%         1.64%         3.76%