*Heading
 C3D8 Elements; Static Analysis
*Node
*Element, type=C3D8
*Elset, elset=I1, generate
** Section: Secn
*Solid Section, elset=I1, material=Elas
1.,
**
** MATERIALS
**
*Material, name=Elas
*Density
25.,
*Elastic
 1e+08,0.
*step
*frequency,eigen=lanc
84,
*boundary
1,1,3
4,1,3
9,1,3
12,1,3
25,1,3
28,1,3
33,1,3
36,1,3
*output, field,freq=0
*end step
*STEP
*substructure generate, type=z1, overwrite,
recovery matrix=yes, mass matrix=yes,libr=lib_smdef_3D_dyn
*RETAINED NODAL DOFS,sorted=no
*Retained Eigenmodes,generate
*substructure matrix output, stiffness=yes,
mass=yes, recovery=yes, file=LibMatrices
*END STEP