*HEADING
: TESTING CPS4I ELEMENTS
*NODE
1,0,0
2,0.5,0
3,1.,0
4,0,0.5
5,0.5,0.5
6,1.,0.5
7,0.,1.
8,0.5,1.
9,1.,1.
*NSET, NSET=NMID
6, 
*ELSET, ELSET=EMID
1,3
*ELEMENT,TYPE=CPS4I,ELSET=E1
1,1,2,5,4
2,2,3,6,5
3,4,5,8,7
4,5,6,9,8
*SOLID SECTION, ELSET=E1, MATERIAL=MAT
*MATERIAL, NAME=MAT
*ELASTIC,TYPE=ISO
2.E7,0.
*DENSITY
8000., 
*DAMPING,ALPHA=5.36,BETA=7.46E-5
****
*STEP,PERT
*STEADY STATE DYNAMICS,DIRECT,FREQUENCY SCALE = LINEAR
10,15.,100,1
*LOAD CASE,NAME="PRESSURE IN X"
*BOUNDARY,OP=NEW
1,1,2
4,1,2
7,1,2
*DLOAD,OP=NEW,LOAD CASE=2
2,P2,30000.
4,P2,30000.
*END LOAD CASE
*LOAD CASE,NAME="PRESSURE IN Y"
*BOUNDARY,OP=NEW
1,1,2
2,1,2
3,1,2
*DLOAD,OP=NEW,LOAD CASE=2
3,P3,30000.
4,P3,30000.
*END LOAD CASE
*EL PRINT
S, 
E, 
*NODE PRINT, NSET=NMID
U,  
*OUTPUT,FIELD,FREQ=20
*NODE OUTPUT
U,
*ELEMENT OUTPUT
S,
E,
*OUTPUT,HISTORY,FREQ=0
*ENDSTEP