*HEADING
  TEST SUBSTRUCTURE ALPHA AND BETA DAMPING FOR DIRECT INTEGRATION
  SUBSTRUCTURE GENERATION FILE psupdmp1_gen1.inp SHOULD BE RUN FIRST
*RESTART,WRITE
*NODE
*ELEMENT,TYPE=Z01,ELSET=LEFT, FILE=psupdmp1_gen1
*ELEMENT,TYPE=Z01,ELSET=RIGHT, FILE=psupdmp1_gen1
*SUBSTRUCTURE PROPERTY,ELSET=LEFT
*SUBSTRUCTURE PROPERTY,ELSET=RIGHT
*STEP
*STATIC
*BOUNDARY
1,1,3
2,2,3
2,1,,1.
*PRINT,RESIDUAL=NO,FREQUENCY=5
*OUTPUT,FIELD,VAR=PRESELECT
*SUBSTRUCTURE PATH,ENTER ELEMENT=1
*EL FILE,FREQUENCY=25
S,E
*EL PRINT,FREQUENCY=25,SUMMARY=NO
S,E
*SUBSTRUCTURE PATH,LEAVE
*NODE FILE,FREQUENCY=5
U,
*NODE PRINT,FREQUENCY=5,SUMMARY=NO
U1,V1,A1,RF1
*END STEP
*STEP,INC=300
*DYNAMIC,ALPHA=0.
.01,2.5
*BOUNDARY,OP=NEW
1,1,3
2,2,3
*SUBSTRUCTURE PATH,ENTER ELEMENT=1
*OUTPUT,FIELD,FREQ=0
*SUBSTRUCTURE PATH,LEAVE
*END STEP