*HEADING
TEST OF VELOCITY BC IN MULTIPLE STATIC STEPS                          
THE VALUES OF THE PRESCRIBED BOUNDARY CONDITIONS
ARE TO BE CHECKED FROM THIS ANALYSIS TO VERIFY THE 
USE OF *BOUNDARY,TYPE=VEL IN MULTIPLE STATIC STEPS.
*RESTART,FREQ=5,WRITE
*NODE,NSET=ALL
1  ,  0. ,   0.
2  , 50. ,   0.
3  ,100. ,   0.
*ELEMENT,TYPE=B21,ELSET=BEAMS
 1 , 1 , 2
 2 , 2 , 3
*BEAM SECTION,SECTION=RECT,ELSET=BEAMS,MATERIAL=MBEAM
1.        , 2.
*MATERIAL,NAME=MBEAM
*ELASTIC
30.E6, 
** SPECIFY SINUSOIDAL AMPLITUDE FUNCTIONS [f(t)=3.0 + 2.0 COS (5t)]
*AMPLITUDE,TIME=TOTAL,NAME=AMPPER1,DEFINITION=PERIODIC
1,20.,0.,3.
2., 
*AMPLITUDE,TIME=STEP,NAME=AMPPER2,DEFINITION=PERIODIC
1,20.,0.,3.
2., 
** DEFINE INITIAL VELOCITIES 
*INITIAL CONDITIONS,TYPE=VELOCITY
2,1,-100.0                             
2,2, 100.0       
3,1,-100.0 
************************************************************************
************************************************************************
** 
** DESCRIPTIONS OF THE INDIVIDUAL BOUNDARY CONDITION SPECIFICATIONS AND
** WHAT THEY ARE SET UP TO TEST:
**                                                           
**  NODE 1,DOF 1: VELOCITY VARIES WITH USER DEFINED AMPLITUDE IN STEP 1, 
**                CONSTANT VELOCITY IN STEP 2,
**                VELOCITY NOT RESPECIFIED IN STEP 3 (OP=MOD),
**                BC REMOVED IN STEP 4 (OP=NEW).
**  NODE 1,DOF 2: VELOCITY VARIES WITH USER DEFINED AMPLITUDE IN STEP 1, 
**                DISPLACEMENT RAMPED LINEARLY IN STEP 2,
**                VELOCITY VARIES WITH USER DEFINED AMPLITUDE IN STEP 3,
**                BC REMOVED IN STEP 4 (OP=NEW).
**  NODE 1,DOF 6: CONSTANT VELOCITY IN STEP 1, 
**                DIFFERENT CONSTANT VELOCITY IN STEP 2,
**                ROTATION FIXED IN STEP 3,
**                ROTATION RAMPED TO ZERO IN STEP 4.
**  NODE 2,DOF 1: CONSTANT VELOCITY IN STEP 1 (INITIAL VEL SHOULD BE IGNORED).
**                DISPLACEMENT RAMPED LINEARLY IN STEP 2,
**                DISPLACEMENT RAMPED TO ZERO IN STEP 3,
**                DISPLACEMENT REMOVED IN STEP 4 (OP=NEW)
**  NODE 2,DOF 2: LINEAR DISPLACEMENT IN STEP 1 (INITIAL VEL SHOULD BE IGNORED) 
**                CONSTANT VELOCITY IN STEP 2.
**                DISPLACEMENT VARIES WITH USER DEFINED AMPLITUDE IN STEP 3,
**                DISPLACEMENT RAMPED TO ZERO IN STEP 4.
**  NODE 2,DOF 6: VELOCITY VARIES WITH USER DEFINED AMP IN STEP 1 (STEP TIME) 
**                VELOCITY NOT SPECIFIED IN STEP 2,
**                ROTATION FIXED IN STEP 3.
**                ROTATION REMOVED IN STEP 4 (OP=NEW)
**  NODE 3,DOF 1: FREE IN STEP 1 (INITIAL VELOCITY SPECIFIED)
**                CONSTANT VELOCITY IN STEP 2,
**                VELOCITY NOT RESPECIFIED IN STEP 3 (OP=MOD),
**                DISPLACEMENT FIXED IN STEP 4.
**  NODE 3,DOF 2: FREE IN STEP 1,
**                DISPLACEMENT VARIES WITH USER DEFINED AMPLITUDE IN STEP 2,
**                CONSTANT VELOCITY IN STEP 3,
**                DISPLACEMENT FIXED IN STEP 4.
**  NODE 3, DOF 6 VELOCITY VARIES WITH USER DEFINED AMP (STEP TIME) IN STEP 1,
**                VELOCITY NOT RE-SPECIFIED IN STEP 2,
**                VELOCITY VARIES WITH USER DEFINED AMP (STEP TIME) IN STEP 3
**                REMOVED IN STEP 4.
************************************************************************
************************************************************************
*STEP,INC=20
STEP 1
*STATIC,DIRECT                                                  
0.05,.6
*BOUNDARY,TYPE=VELOCITY,AMP=AMPPER1
1,1,1,1.
*BOUNDARY,TYPE=VELOCITY,AMP=AMPPER1
1,2,2,1.
*BOUNDARY,TYPE=VELOCITY
1,6,6,6.
*BOUNDARY,TYPE=VELOCITY
2,1,1,0.
*BOUNDARY
2,2,2,10.
*BOUNDARY,AMP=AMPPER2
2,6,6,1.
*BOUNDARY,TYPE=VELOCITY,AMP=AMPPER2
3,6,6,1.
*EL PRINT,FREQ=0
*PRINT,RESIDUAL=NO
*NODE PRINT,FREQ=1
U, 
*NODE FILE,FREQ=1
U, 
*END STEP
************************************************************************
**
** SECOND STEP
**
************************************************************************
*STEP,INC=20
STEP 2
*STATIC,DIRECT
0.1,1.4
*BOUNDARY,TYPE=VELOCITY
1,1,1,-2.
*BOUNDARY        
1,2,2,10.
*BOUNDARY,TYPE=VELOCITY       
1,6,6,10.
*BOUNDARY
2,1,1,10.
*BOUNDARY,TYPE=VELOCITY
2,2,2,-10
*BOUNDARY,TYPE=VELOCITY
3,1,1,-1.
*BOUNDARY,AMP=AMPPER1
3,2,2,1.
*END STEP
************************************************************************
**
** THIRD STEP
**
************************************************************************
*STEP,INC=20
STEP 3
*STATIC,DIRECT
0.1,1.2
*BOUNDARY,TYPE=VELOCITY,AMP=AMPPER2
1,2,2,-1.
*BOUNDARY,FIXED
1,6,6
*BOUNDARY
2,1,1,0.                                                                 
*BOUNDARY,AMP=AMPPER1
2,2,2,1.                                                                  
*BOUNDARY,FIXED
2,6,6
*BOUNDARY,TYPE=VELOCITY
3,2,2,-1.
*BOUNDARY,TYPE=VELOCITY,AMP=AMPPER2
3,6,6,-1.
*END STEP
************************************************************************
**
** FOURTH STEP
**
************************************************************************
*STEP,INC=20
STEP 4
*STATIC,DIRECT
0.1,.8
*BOUNDARY,OP=NEW
1,6,6,0.
*BOUNDARY,OP=NEW
2,2,2,0.                                                                  
*BOUNDARY,FIXED,OP=NEW
3,1,1
3,2,2
*END STEP