*HEADING
PULSE LOADING 
STEADY STATE DYNAMICS,DIRECT VERIFICATION OF CINAX4 USING DASHPOTS
*NODE
1,1000.,0.
3,1001.,0.
2,1000.,-1.
4,1001.,-1.
*NSET,NSET=TOP
1,3
*NSET,NSET=NALL,GENERATE
1,4,1
*NSET,NSET=REF
1000, 
*NSET,NSET=BOT
2,4
*ELEMENT,TYPE=CAX4,ELSET=FE
1,2,4,3,1
*SOLID SECTION,ELSET=FE,MATERIAL=ONE
*MATERIAL,NAME=ONE
*ELASTIC
1.,.1
*DENSITY
.01, 
*ELEMENT,TYPE=DASHPOT1,ELSET=DPOT2
101,2
102,4
*DASHPOT,ELSET=DPOT2
2, 
317.86781, 
*ELEMENT,TYPE=DASHPOT1,ELSET=DPOT1
103,2
104,4
*DASHPOT,ELSET=DPOT1
1, 
211.80555, 
*RESTART,WRITE,FREQUENCY=1
*STEP
*STEADYSTATEDYNAMICS,DIRECT,FREQUENCY SCALE=LINEAR
0.01,0.04,4,1
*BOUNDARY
NALL,1
TOP,2,2,1.E-4
*ENERGY FILE
*ENERGY PRINT
*EL PRINT,FREQUENCY=0
*NODE PRINT
U, 
PU, 
*NODE FILE
U, 
PU, 
*END STEP
*STEP
*STEADYSTATEDYNAMICS,DIRECT,FREQUENCY SCALE=LINEAR
0.01,0.04,4,1
*BOUNDARY,OP=NEW
NALL,2
TOP,1,1,1.E-4
*ENERGY FILE
*ENERGY PRINT
*EL PRINT,FREQUENCY=0
*NODE PRINT
U, 
PU, 
*NODE FILE
U, 
PU, 
*END STEP