** SUBSTRUCTURE GENERATION FILE FOR substrframe_rotz201_2modes.inp
*NODE
*NGEN
*ELEMENT,TYPE=B31,ELSET=COLUMN
*ELGEN,ELSET=COLUMN
*BEAM SECTION,SECTION=RECT,MATERIAL=STEEL,ELSET=COLUMN
0.1 , 0.1
 0, -1.
3,3
*MATERIAL,NAME=STEEL
*ELASTIC
2.1E11 , 0.3
*DENSITY
7200.,
**
**
*STEP
*FREQUENCY, EIGENSOLVER=LANCZOS
2,
*BOUNDARY
1,1,6,0
11,1,6,0
*EL PRINT,FREQUENCY=0
*END STEP
**
**
*STEP
*SUBSTRUCTURE GENERATE,TYPE=Z101,MASS MATRIX=YES,OVERWRITE
*RETAINED NODAL DOFS
*RETAINED EIGENMODES
*END STEP