*Heading
Test edge to edge contact of acoustic inf elements
*PREPRINT, MODEL=YES
*PARAMETER
f=15
T1=0.001
omega=2*3.14159*f
*Node
1, 0.0, 0.0, 0.0
2, 1.0, 0.0, 0.0
3, 1.0, 1.0, 0.0
4, 0.0, 1.0, 0.0
5, 0.0, 0.0, 1.0
6, 1.0, 0.0, 1.0
7, 1.0, 1.0, 1.0
8, 0.0, 1.0, 1.0
**
 9, 1.0, 0.0, 0.0
10, 1.0, 0.5, 0.0
11, 1.0, 1.0, 0.0
12, 1.0, 0.0, 1.0
13, 1.0, 0.5, 1.0
14, 1.0, 1.0, 1.0
15, 1.0, 0.5, 0.0
16, 1.0, 0.5, 1.0
*Element, Type=AC3D8, Elset=Fluid
1, 1, 2, 3, 4, 5, 6, 7, 8
*Element, Type=ACIN3D4, Elset=Inf
2,  9, 10, 13, 12
3, 15, 11, 14, 16
*SOLID SECTION,ELSET=INF, MATERIAL=FLUID
1.0, -100.0, 0.5, 0.5
*****
*SOLID SECTION, ELSET=FLUID, MATERIAL=FLUID
*MATERIAL, NAME=FLUID
*ACOUSTIC MEDIUM
2.25E6
*DENSITY
1000.0
** Edge Contact
*Surface, Name=TwoEdge, Type=Element
2, E2
*Surface, Name=ThreeEdge, Type=Element
3, E4
*Tie, Name=Edge
ThreeEdge, TwoEdge
**Surface Contact
*Surface, Name=Main, Type=Element
2, SPOS
3, SPOS
*Surface, Name=Secondary, Type=Element
1, S4
*Tie, name=Surf
Secondary, Main
*AMPLITUDE,NAME=SINE,DEF=PERIODIC
1,<omega>,0.0,0.0
0,1,0,0
*STEP,  INC=10000
*DYNAMIC,HAFTOL=1.0
0.001,<T1>
*BOUNDARY, AMP=SINE
9,8,,1.e2
10,8,,1.e2
12,8,,1.e2
13,8,,1.e2
*END STEP