*HEADING
 ONE ELEMENT SUBSTRUCTURE
**
*NODE,NSET=NALL
*ELEMENT, TYPE=T2D2, ELSET=EELAS
*SOLID SECTION,MATERIAL=M1, ELSET=EELAS
*MATERIAL, NAME=M1
*ELASTIC
3.E5,0.3
**
**
*STEP
*STATIC
0.1,1.0
*BOUNDARY
1,1,3
2,1,1,0.1
*ELFILE
S,E
*ENDSTEP
**
**
*STEP
*SUBSTRUCTURE GENERATE,TYPE=Z1,OVERWRITE
*RETAINED NODAL DOFS, SORTED=NO
NALL,
*BOUNDARY, OP=NEW
*SUBSTRUCTURE MATRIX OUTPUT, STIFFNESS=YES
*END STEP