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File modf contains the eigen modes, of the model.
Example of a modf-file of a BoBo-vehicle, written by MODAL:
Output of eigenmodes from program Modal rel.0003 ----================================================---- Ident = modal_1 Date = 2000-05-26 Time = 12.43 Headlines= Course in Rail Vehicle Dynamics BoBo-vehicle; Wheel S1002, Rail UIC60i40; Friction= .400; Speed= 160. Track geom.=Tangent_Track, Track irr.=Ideal_track ----------------------------------------------------------- the eigenforms are scaled to maximum amplitude of '1' the eigenforms are sorted in size order. first row in output data is degree of freedom. second row in output data is real part of the eigenform third row in output data is imagimary part of the eigenform Eigenform number 1 pole(-1.3416E+03, 0.0000E+00) frequency= .00 trc_112.vy trc_111.vy trc_121.vy trc_122.vy axl_112.vy axl_111.vy 1.00000E+00 9.99942E-01 9.37980E-01 9.37901E-01 -4.43627E-01 -4.43601E-01 0.00000E+00 0.00000E+00 0.00000E+00 0.00000E+00 0.00000E+00 0.00000E+00 axl_112.vf axl_111.vf axl_121.vy axl_122.vy axl_121.vf axl_122.vf 4.28675E-01 4.28650E-01 -4.16113E-01 -4.16078E-01 4.02089E-01 4.02055E-01 0.00000E+00 0.00000E+00 0.00000E+00 0.00000E+00 0.00000E+00 0.00000E+00 bog_11.vf bog_12.vf axl_112.vp axl_111.vp axl_121.vp axl_122.vp -1.32389E-02 -1.24177E-02 5.45981E-03 5.45949E-03 5.12121E-03 5.12078E-03 0.00000E+00 0.00000E+00 0.00000E+00 0.00000E+00 0.00000E+00 0.00000E+00 trc_112.y trc_111.y trc_121.y trc_122.y axl_112.y axl_111.y -7.45368E-04 -7.45324E-04 -6.99140E-04 -6.99082E-04 3.30665E-04 3.30646E-04 0.00000E+00 0.00000E+00 0.00000E+00 0.00000E+00 0.00000E+00 0.00000E+00 axl_112.f axl_111.f axl_121.y axl_122.y axl_121.f axl_122.f -3.19521E-04 -3.19502E-04 3.10157E-04 3.10131E-04 -2.99704E-04 -2.99679E-04 0.00000E+00 0.00000E+00 0.00000E+00 0.00000E+00 0.00000E+00 0.00000E+00 bog_11.vy bog_12.vy car_1.vf bog_11.f bog_12.f bog_12.vp 2.06291E-04 1.93502E-04 2.01253E-05 9.86783E-06 9.25573E-06 6.64938E-06 0.00000E+00 0.00000E+00 0.00000E+00 0.00000E+00 0.00000E+00 0.00000E+00 bog_11.vp axl_112.p axl_111.p axl_121.p axl_122.p ccb11r.p -4.96167E-06 -4.06956E-06 -4.06933E-06 -3.81718E-06 -3.81686E-06 1.88233E-06 0.00000E+00 0.00000E+00 0.00000E+00 0.00000E+00 0.00000E+00 0.00000E+00 ccb11l.p ccb12r.p ccb12l.p car_1.vy bog_11.y bog_12.y -1.88233E-06 1.76376E-06 -1.76376E-06 -4.44667E-07 -1.53763E-07 -1.44230E-07 0.00000E+00 0.00000E+00 0.00000E+00 0.00000E+00 0.00000E+00 0.00000E+00 car_1.f bog_12.p bog_11.p car_1.y car_1.vp car_1.p -1.50008E-08 -4.95623E-09 3.69827E-09 3.31440E-10 2.08301E-10 -1.55261E-13 0.00000E+00 0.00000E+00 0.00000E+00 0.00000E+00 0.00000E+00 0.00000E+00 axl_111.vz axl_112.vz axl_121.vz axl_122.vz axl_121.vk axl_111.vk -1.47804E-14 -1.47152E-14 -1.39173E-14 -1.38365E-14 1.99348E-16 1.98933E-16 0.00000E+00 0.00000E+00 0.00000E+00 0.00000E+00 0.00000E+00 0.00000E+00 axl_122.vk axl_112.vk bog_11.vz bog_12.vz bog_11.vk bog_12.vk -1.83175E-16 -1.69599E-16 1.45867E-16 1.04151E-16 5.99446E-17 5.97873E-17 0.00000E+00 0.00000E+00 0.00000E+00 0.00000E+00 0.00000E+00 0.00000E+00 bog_12.vx bog_11.vx axl_122.vx axl_112.vx axl_121.vx axl_111.vx 4.95462E-17 4.56880E-17 -4.04129E-17 -3.84516E-17 3.52257E-17 3.46448E-17 0.00000E+00 0.00000E+00 0.00000E+00 0.00000E+00 0.00000E+00 0.00000E+00 car_1.vx axl_111.z axl_112.z axl_121.z axl_122.z car_1.vz -1.96894E-17 1.10517E-17 1.09802E-17 1.03456E-17 1.02903E-17 1.18938E-18 0.00000E+00 0.00000E+00 0.00000E+00 0.00000E+00 0.00000E+00 0.00000E+00 car_1.x car_1.vk bog_11.z axl_122.x axl_112.x axl_111.x 3.59210E-19 3.16820E-19 -2.44373E-19 1.94114E-19 1.90214E-19 1.40656E-19 0.00000E+00 0.00000E+00 0.00000E+00 0.00000E+00 0.00000E+00 0.00000E+00 axl_121.x bog_12.z bog_11.k bog_12.k bog_12.x bog_11.x 1.37678E-19 1.33340E-19 1.06179E-19 6.50057E-20 -5.91073E-20 -1.24055E-20 0.00000E+00 0.00000E+00 0.00000E+00 0.00000E+00 0.00000E+00 0.00000E+00 car_1.k car_1.z 1.23696E-20 -3.01798E-21 0.00000E+00 0.00000E+00 Eigenform number 2 pole(-1.3416E+03, 0.0000E+00) frequency= .00 trc_121.vy trc_122.vy trc_112.vy trc_111.vy axl_121.vy axl_122.vy 1.00000E+00 9.99917E-01 -9.38086E-01 -9.38031E-01 -4.43627E-01 -4.43590E-01 0.00000E+00 0.00000E+00 0.00000E+00 0.00000E+00 0.00000E+00 0.00000E+00 axl_121.vf axl_122.vf axl_112.vy axl_111.vy axl_112.vf axl_111.vf 4.28675E-01 4.28640E-01 4.16160E-01 4.16136E-01 -4.02135E-01 -4.02111E-01 0.00000E+00 0.00000E+00 0.00000E+00 0.00000E+00 0.00000E+00 0.00000E+00 . . . .etc. Output of eigenmodes from program Modal rel.0003 ----================================================---- Ident = modal_1 Date = 2000-05-26 Time = 12.43 Headlines= Course in Rail Vehicle Dynamics BoBo-vehicle; Wheel S1002, Rail UIC60i40; Friction= .400; Speed= 160. Track geom.=Tangent_Track, Track irr.=Ideal_track ----------------------------------------------------------- the eigenforms are scaled to maximum amplitude of '1' the eigenforms are sorted in size order. first row in output data is degree of freedom. second row in output data is the absolute value of the eigenform third row in output data is the angle of phase expressed in degrees Eigenform number 1 pole(-1.3416E+03, 0.0000E+00) frequency= .00 trc_112.vy trc_111.vy trc_121.vy trc_122.vy axl_112.vy axl_111.vy 1.00000E+00 9.99942E-01 9.37980E-01 9.37901E-01 4.43627E-01 4.43601E-01 .0000000 .0000000 .0000000 .0000000 180.0000000 180.0000000 axl_112.vf axl_111.vf axl_121.vy axl_122.vy axl_121.vf axl_122.vf 4.28675E-01 4.28650E-01 4.16113E-01 4.16078E-01 4.02089E-01 4.02055E-01 .0000000 .0000000 180.0000000 180.0000000 .0000000 .0000000 bog_11.vf bog_12.vf axl_112.vp axl_111.vp axl_121.vp axl_122.vp 1.32389E-02 1.24177E-02 5.45981E-03 5.45949E-03 5.12121E-03 5.12078E-03 180.0000000 180.0000000 .0000000 .0000000 .0000000 .0000000 trc_112.y trc_111.y trc_121.y trc_122.y axl_112.y axl_111.y 7.45368E-04 7.45324E-04 6.99140E-04 6.99082E-04 3.30665E-04 3.30646E-04 180.0000000 180.0000000 180.0000000 180.0000000 .0000000 .0000000 axl_112.f axl_111.f axl_121.y axl_122.y axl_121.f axl_122.f 3.19521E-04 3.19502E-04 3.10157E-04 3.10131E-04 2.99704E-04 2.99679E-04 180.0000000 180.0000000 .0000000 .0000000 180.0000000 180.0000000 bog_11.vy bog_12.vy car_1.vf bog_11.f bog_12.f bog_12.vp 2.06291E-04 1.93502E-04 2.01253E-05 9.86783E-06 9.25573E-06 6.64938E-06 .0000000 .0000000 .0000000 .0000000 .0000000 .0000000 bog_11.vp axl_112.p axl_111.p axl_121.p axl_122.p ccb11r.p 4.96167E-06 4.06956E-06 4.06933E-06 3.81718E-06 3.81686E-06 1.88233E-06 180.0000000 180.0000000 180.0000000 180.0000000 180.0000000 .0000000 ccb11l.p ccb12r.p ccb12l.p car_1.vy bog_11.y bog_12.y 1.88233E-06 1.76376E-06 1.76376E-06 4.44667E-07 1.53763E-07 1.44230E-07 180.0000000 .0000000 180.0000000 180.0000000 180.0000000 180.0000000 car_1.f bog_12.p bog_11.p car_1.y car_1.vp car_1.p 1.50008E-08 4.95623E-09 3.69827E-09 3.31440E-10 2.08301E-10 1.55261E-13 180.0000000 180.0000000 .0000000 .0000000 .0000000 180.0000000 axl_111.vz axl_112.vz axl_121.vz axl_122.vz axl_121.vk axl_111.vk 1.47804E-14 1.47152E-14 1.39173E-14 1.38365E-14 1.99348E-16 1.98933E-16 180.0000000 180.0000000 180.0000000 180.0000000 .0000000 .0000000 axl_122.vk axl_112.vk bog_11.vz bog_12.vz bog_11.vk bog_12.vk 1.83175E-16 1.69599E-16 1.45867E-16 1.04151E-16 5.99446E-17 5.97873E-17 180.0000000 180.0000000 .0000000 .0000000 .0000000 .0000000 bog_12.vx bog_11.vx axl_122.vx axl_112.vx axl_121.vx axl_111.vx 4.95462E-17 4.56880E-17 4.04129E-17 3.84516E-17 3.52257E-17 3.46448E-17 .0000000 .0000000 180.0000000 180.0000000 .0000000 .0000000 car_1.vx axl_111.z axl_112.z axl_121.z axl_122.z car_1.vz 1.96894E-17 1.10517E-17 1.09802E-17 1.03456E-17 1.02903E-17 1.18938E-18 180.0000000 .0000000 .0000000 .0000000 .0000000 .0000000 car_1.x car_1.vk bog_11.z axl_122.x axl_112.x axl_111.x 3.59210E-19 3.16820E-19 2.44373E-19 1.94114E-19 1.90214E-19 1.40656E-19 .0000000 .0000000 180.0000000 .0000000 .0000000 .0000000 axl_121.x bog_12.z bog_11.k bog_12.k bog_12.x bog_11.x 1.37678E-19 1.33340E-19 1.06179E-19 6.50057E-20 5.91073E-20 1.24055E-20 .0000000 .0000000 .0000000 .0000000 180.0000000 180.0000000 car_1.k car_1.z 1.23696E-20 3.01798E-21 .0000000 .0000000 Eigenform number 2 pole(-1.3416E+03, 0.0000E+00) frequency= .00 trc_121.vy trc_122.vy trc_112.vy trc_111.vy axl_121.vy axl_122.vy 1.00000E+00 9.99917E-01 9.38086E-01 9.38031E-01 4.43627E-01 4.43590E-01 .0000000 .0000000 -180.0000000 -180.0000000 -180.0000000 -180.0000000 axl_121.vf axl_122.vf axl_112.vy axl_111.vy axl_112.vf axl_111.vf 4.28675E-01 4.28640E-01 4.16160E-01 4.16136E-01 4.02135E-01 4.02111E-01 .0000000 .0000000 .0000000 .0000000 -180.0000000 -180.0000000 . . . .etc.