*HEADING
: FOUNDATION TYPE F2  [PIPE31]
PERTURBATION/LOAD CASE ANALYSIS
*NODE,NSET=ALL
 1,0.
 2,15.
*ELEMENT,TYPE=PIPE31, ELSET=EALL
 1,1,2
*BEAM SECTION,SECTION=PIPE,MATERIAL=A1, ELSET=EALL
 2.,0.2
*MATERIAL,NAME=A1
*ELASTIC
 3.E+6,0.3
*FOUNDATION
 1,F2,300.
*STEP,PERTURBATION
*STATIC
*BOUNDARY
 ALL,1
 ALL,2,,-0.1
 ALL,3,
 ALL,4
 ALL,5
*OUTPUT,HISTORY,FREQUENCY=1
*ENERGY OUTPUT,VARIABLE=PRESELECT
*OUTPUT,FIELD
*ELEMENT OUTPUT
LOADS,
*EL PRINT
 LOADS,
*OUTPUT,FIELD
*NODE OUTPUT
RF,
*NODE PRINT
 RF, 
*END STEP

*STEP,PERTURBATION
Test FOR *LOAD CASE OPTION
*STATIC
*LOAD CASE,NAME="VERTICAL DISPLACEMENT 1"
*BOUNDARY
 ALL,1
 ALL,2,,-0.1
 ALL,3,
 ALL,4
 ALL,5
*END LOAD CASE
*LOAD CASE,NAME="VERTICAL DISPLACEMENT 2"
*BOUNDARY
 ALL,1
 ALL,2,,-0.2
 ALL,3,
 ALL,4
 ALL,5
*END LOAD CASE
*OUTPUT,FIELD
*ELEMENT OUTPUT
LOADS,
*EL PRINT
 LOADS,
*OUTPUT,FIELD
*NODE OUTPUT
RF,
*NODE PRINT
 RF, 
*END STEP