*HEADING
[ACIN2DN, edge-surface impedances, transient]
*preprint,model=yes,history=yes,echo=yes
********************************
*part,name=plates
*NODE, NSET=first
*********************************
*NSET,NSET=ALLNODES
FIRST,
*element,type=b21,elset=mass
*element,type=b22,elset=mass
*surface,name=sm1
201,sneg
*surface,name=sm2
202,sneg
*BEAMSECTION,MATERIAL=METAL,ELSET=MASS,SECTION=RECT
*end part
********************************
*part,name=aco
*NODE, NSET=first
*ncopy,changenumber=10,oldset=first,newset=second,shift
*ncopy,changenumber=20,oldset=first,newset=third,shift
*NSET,NSET=ALLNODES
FIRST,second,third
*NSET,NSET=QA_TEST,generate
*element,elset=inf2,type=ac2d4
*element,elset=inf3,type=ac2d8
*element,type=acin2d2,elset=inf2
*element,type=acin2d3,elset=inf3
*surface,name=acinS2
11,s1
*surface,name=acins3
12,s1
*surface,name=acine2
1,e1
**1,e2
*surface,name=acine3
2,e1
**2,e2
*surface,name=ac4_s2
11,s2
11,s4
*surface,name=ac8_s2
12,s2
12,s4
***************************************
*SOLID SECTION,MATERIAL=AIR320,ELSET=INF2
1.0, 0.0,0.5,.0
*SOLID SECTION,MATERIAL=AIR320,ELSET=INF3
1.0, 0.0,2.5,.0
*endpart
***************************************
*assembly,name=assy1
*instance,name=PEdgeZ,part=plates
*end instance
*instance,name=EdgeZ,part=aco
*end instance
*instance,name=PnoneEdgeZ,part=plates
*end instance
*instance,name=noneEdgeZ,part=aco
*end instance
*tie,name=quad4
noneEdgeZ.acins2,PnoneEdgeZ.sm1
noneEdgeZ.acins3,PnoneEdgeZ.sm2
EdgeZ.acins2,PEdgeZ.sm1
EdgeZ.acins3,PEdgeZ.sm2
*end assembly
*************************************
** MATERIAL IMPEDANCE FOR AIR320 IS 400.0
** THE ADMITTANCE FOR HALF THIS VALUE IS USED
**
*impedance property,name=Half_Zmat
*MATERIAL,NAME=AIR320
*DENSITY
1.25,
*ACOUSTIC MEDIUM,BULK MODULUS
*material,name=metal
*density
7800.0,
*elastic
200.0e9,0.3
*amplitude,definition=perio,name=TenPiHz
1, 5.0, 0.0, 0.0
0.0,1.0,0.0,0.0
*************************************
*STEP,inc=1000
*dynamic
5.e-2,50.e-1
*SIMPEDANCE
ASSY1.EDGEZ.ACINE2,HALF_ZMAT
ASSY1.EDGEZ.ACINE3,HALF_ZMAT
ASSY1.EDGEZ.AC4_s2,HALF_ZMAT
ASSY1.EDGEZ.AC8_s2,HALF_ZMAT
*BOUNDARY,type=acceleration,amplitude=tenpihz
ASSY1.PNONEEDGEZ.ALLNODES,1,1,1.0e-4
ASSY1.PEDGEZ.ALLNODES,    1,1,1.0e-4
*BOUNDARY
ASSY1.PNONEEDGEZ.ALLNODES,2,6,0.0
ASSY1.PEDGEZ.ALLNODES,    2,6,0.0
*OUTPUT,HISTORY,FREQUENCY=1
*NODE OUTPUT,NSET=NONEEDGEZ.QA_TEST
POR,
*NODE OUTPUT,NSET=EDGEZ.QA_TEST
POR,
*OUTPUT,FIELD,FREQUENCY=99999
*ELEMENT OUTPUT
*END STEP