*HEADING
 STEADY STATE DYNAMICS OF 1-DOF SYSTEM WITH VISCOUS DAMPING
*NODE,NSET=FILE
1,10.
*ELEMENT,TYPE=DASHPOT1,ELSET=D
1,1
*DASHPOT,ELSET=D,DEPENDENCIES=1
1,
0.12,,,0.
0.24,,,1.
*ELEMENT,TYPE=SPRING1,ELSET=S
2,1
*SPRING,ELSET=S
1,
30.,
*ELEMENT,TYPE=MASS,ELSET=M
3,1
*MASS ,ELSET=M
0.02588,
*NSET,NSET=NALL
1,
*BOUNDARY
1,2,6
***
** STEP 1 - DIRECT SSD
***
*STEP
 SSD, DIRECT WITH VISCOUS DAMPING COEFF = 0.12
*STEADY STATE DYNAMICS,DIRECT,FREQUENCY SCALE=LINEAR
0.05, 10., 40, 1
*CLOAD
1,1,1.0
*NODE PRINT,FREQ=10
U,PU
V,
A,
*OUTPUT,HISTORY,OP=ADD,FREQUENCY=1
*NODE OUTPUT,NSET=NALL
U, V, A,
*END STEP
***
** STEP 2 - FREQUENCY EXTRACTION
***
*STEP
 FREQUENCY EXTRACTION
*FREQUENCY, EIGENSOLVER=AMS, NORM=MASS, DAMPING PROJ=ON
1, , 20,
*END STEP
***
** STEP 3 - SSD 
***
*STEP
 STEADY STATE DYNAMICS
*STEADY STATE DYNAMICS, FREQUENCY SCALE=LINEAR, INTERVAL=RANGE
0.05, 10., 40, 1
*CLOAD
1,1,1.0
*END STEP