*Heading
 B31 Elements, Static Analysis
** Job name: nosubstr_rbm_beam2d_sta Model name: Model-1
*Node
      1,           0.,           0.
      2,           1.,           0.
      3,          10.,           1.
      4,           2.,    0.1111111
      5,           3.,    0.2222222
      6,           4.,    0.3333333
      7,           5.,    0.4444444
      8,           6.,    0.5555556
      9,           7.,    0.6666667
     10,           8.,    0.7777778
     11,           9.,    0.8888889
*Element, type=B31
1, 1, 2
 2,  2,  4
 3,  4,  5
 4,  5,  6
 5,  6,  7
 6,  7,  8
 7,  8,  9
 8,  9, 10
 9, 10, 11
10, 11,  3
** Region: (Secn:Picked), (Beam Orientation:Picked)
*Elset, elset=I1, generate
 1, 10,  1
** Section: Secn  Profile: Prof
*Beam Section, elset=I1, Section=RECT,material=Elas
1.0, 1.0
0.,0.,-1.
**Nset, nset=_Set4, internal, instance=Beam3d-1
** 1,
**Nset, nset=_Set5, internal, instance=Beam3d-1
** 3,
** 
** MATERIALS
** 
*Material, name=Elas
*Density
10.,
*Elastic
 1e+08,0.
*step
*frequency,eigen=lanc
10,
*boundary
1,1,6
2,1,6
3,1,6
*node print 
u,
*end step
*STEP
*substructure generate, type=z1, overwrite, 
recovery matrix=yes, mass matrix=yes,
libr=lib_rbm_beam3d
*RETAINED NODAL DOFS
**,sorted=no
1,1,6
2,1,6
3,1,6
*SELECT EIGENMODES
1,2,3,4,5,6,7,8,9,10
*substructure matrix output, stiffness=yes, 
mass=yes, recovery=yes, file=lib_rbm_beam3d
*END STEP