*Heading
 1D wave propagation, acoustic medium
**
** PARTS
**
*Part, name=ac3d10
*End Part
*Part, name=ac3d15
*End Part
*Part, name=ac3d20
*End Part
*Part, name=ac3d4
*End Part
*Part, name=ac3d6
*End Part
*Part, name=ac3d8
*End Part
*Part, name=ac3d5
*End Part
**
** ASSEMBLY
**
*Assembly, name=Assembly
**
*Instance, name=ac3d8-1, part=ac3d8
*Node
*Element, type=AC3D8,elset=eall
*Element, type=ACIN3D4, elset=eall
** Region: (Section-1:Picked)
*Elset, elset=_PickedSet3, internal, generate
** Section: Section-1
*Solid Section, elset=_PickedSet3, material=air,refnode=21
1.,
*End Instance
**
*Instance, name=ac3d6-1, part=ac3d6
*Node
*Element, type=AC3D6,elset=eall
*Element, type=ACIN3D4, elset=eall
** Region: (Section-1:Picked)
*Elset, elset=_PickedSet3, internal, generate
** Section: Section-1
*Solid Section, elset=_PickedSet3, material=air,refnode=21
1.,
*End Instance
**
*Instance, name=ac3d4-1, part=ac3d4
*Node
*Element, type=AC3D4,elset=eall
*Element, type=ACIN3D3, elset=eall
** Region: (Section-1:Picked)
*Elset, elset=_PickedSet3, internal, generate
** Section: Section-1
*Solid Section, elset=_PickedSet3, material=air, refnode=3
1.,
*End Instance
**
*Instance, name=ac3d20-1, part=ac3d20
*Node
*Element, type=AC3D20,elset=eall
*Element, type=ACIN3D8
** Region: (Section-1:Picked)
*Elset, elset=_PickedSet3, internal, generate
** Section: Section-1
*Solid Section, elset=_PickedSet3, material=air, REFNODE=12
1.,
*End Instance
**
*Instance, name=ac3d15-1, part=ac3d15
*Node
*Element, type=AC3D15,elset=eall
*Element, type=ACIN3D8,elset=eall
** Region: (Section-1:Picked)
*Elset, elset=_PickedSet3, internal, generate
** Section: Section-1
*Solid Section, elset=_PickedSet3, material=air, refnode=3
1.,
*End Instance
**
*Instance, name=ac3d10-1, part=ac3d10
*Node
*Element, type=AC3D10,elset=eall
*Element, type=ACIN3D6
** Region: (Section-1:Picked)
*Elset, elset=_PickedSet4, internal, generate
** Section: Section-1
*Solid Section, elset=_PickedSet4, material=air, refnode=3
1.,
*End Instance
*Instance, name=ac3d5-1, part=ac3d5
*Node
*Element, type=AC3D5,elset=eall
*Element, type=ACIN3D3, elset=eall
** Region: (Section-1:Picked)
*Elset, elset=_PickedSet3, internal, generate
** Section: Section-1
*Solid Section, elset=_PickedSet3, material=air, refnode=21
1.,
*End Instance
*Nset, nset=QA_TEST, instance=ac3d8-1
*Nset, nset=QA_TEST, instance=ac3d6-1
*Nset, nset=QA_TEST, instance=ac3d20-1
*Nset, nset=QA_TEST, instance=ac3d10-1
*Nset, nset=QA_TEST, instance=ac3d4-1
*Nset, nset=QA_TEST, instance=ac3d15-1
*Elset, elset=QA_TEST, instance=ac3d8-1
*Elset, elset=QA_TEST, instance=ac3d6-1
*Elset, elset=QA_TEST, instance=ac3d20-1
*Elset, elset=QA_TEST, instance=ac3d10-1
*Elset, elset=QA_TEST, instance=ac3d4-1
*Elset, elset=QA_TEST, instance=ac3d15-1
*Elset, elset=_Bottom_S3, internal, instance=ac3d8-1
*Elset, elset=_Bottom_S3, internal, instance=ac3d20-1
*Elset, elset=_Bottom_S3, internal, instance=ac3d10-1
*Elset, elset=_Bottom_S3, internal, instance=ac3d4-1
*Elset, elset=_Bottom_S5, internal, instance=ac3d6-1
*Elset, elset=_Bottom_S5, internal, instance=ac3d15-1
*Surface, type=ELEMENT, name=Bottom
_Bottom_S3, S3
_Bottom_S5, S5
**Elset, elset=_Top_S5, internal, instance=ac3d8-1
**10,
*Elset, elset=_Top_S5, internal, instance=ac3d20-1
*Elset, elset=_Top_S3, internal, instance=ac3d6-1
*Elset, elset=_Top_S3, internal, instance=ac3d10-1
*Elset, elset=_Top_S3, internal, instance=ac3d4-1
*Elset, elset=_Top_S3, internal, instance=ac3d15-1
*Surface, type=ELEMENT, name=Top
_Top_S5, S5
_Top_S3, S3
*Elset, elset=elout, internal, instance=ac3d8-1
eall,
*Elset, elset=elout, internal, instance=ac3d20-1
eall,
*Elset, elset=elout, internal, instance=ac3d6-1
eall,
*Elset, elset=elout, internal, instance=ac3d10-1
eall,
*Elset, elset=elout, internal, instance=ac3d4-1
eall,
*Elset, elset=elout, internal, instance=ac3d15-1
eall,
*End Assembly
**
** MATERIALS
**
*MATERIAL,NAME=AIR
*DENSITY
1.e3,
*ACOUSTIC MEDIUM,BULK MODULUS
**
***********************************************
*STEP
REAL EIGENANALYSIS
*frequency
18,410.0, 3730.0
**
*OUTPUT, FIELD
*NODE OUTPUT
POR
*END STEP
***********************************************
*STEP
COMPLEX EIGENANALYSIS
*complex frequency
*OUTPUT, FIELD
*NODE OUTPUT
POR
*END STEP
***********************************************