*HEADING
VERIFICATION OF ACOUSTIC/STRUCTURAL ANALYSIS - UNCOUPLED CASE
   TEST TEMPERATURE AND FV DEPENDENCE OF ACOUSTIC PROPERTIES
*NODE,NSET=QA_TEST
10,  0.0
20,  5.0
*ELEMENT,TYPE=AC1D2,ELSET=FLUID
1, 10,20
*ELEMENT,TYPE=MASS,ELSET=MASS
2, 20
*ELEMENT,TYPE=SPRING1,ELSET=SPRING
3, 20
*ELEMENT,TYPE=DASHPOT1,ELSET=DASHPOT
4, 20
*SOLID SECTION,MATERIAL=FLUID,ELSET=FLUID
*MATERIAL,NAME=FLUID
*DENSITY,DEPENDENCIES=1
**0.4008 = nominal density
0.1008,30.,3.
0.3008,70.,3.
0.5008,30.,9.
0.7008,70.,9.
*ACOUSTIC MEDIUM,DEPENDENCIES=2
**10.
3.,20.,1.,0.
4.,50.,1.,0.
5.,80.,1.,0.
5.,20.,11.,0.
6.,50.,11.,0.
7.,80.,11.,0.
9.,20.,1.,10.
10.,50.,1.,10.
11.,80.,1.,10.
19.,20.,11.,10.
20.,50.,11.,10.
21.,80.,11.,10.
*ACOUSTIC MEDIUM,DEPENDENCIES=1,VOLUMETRIC DRAG
**0.04
0.0,,20.,0.
0.03,,50.,0.
0.06,,80.,0.
0.01,,20.,12.
0.05,,50.,12.
0.09,,80.,12.
*MASS,ELSET=MASS
4., 
** add dummy frequency dependencies for spring and dashpot
*SPRING,ELSET=SPRING
1, 
1.0,0.
1.0,1.
*DASHPOT,ELSET=DASHPOT
1, 
0.08,0.
0.08,1.
*IMPEDANCE PROPERTY,NAME=RAS
0.25,0.01
*BOUNDARY
10, 8,
20, 2, 3
******************
*INITIAL CONDITIONS,TYPE=TEMPERATURE
10,50.
20,50.
*INITIAL CONDITIONS,TYPE=FIELD,VARIABLE=1
10,6.
20,6.
*INITIAL CONDITIONS,TYPE=FIELD,VARIABLE=2
10,5.
20,5.
*RESTART,WRITE,FREQUENCY=999
************************************************
*STEP
STEP 1: REAL EIGENVALUES
*FREQUENCY, eigensolver=lanczos, SIM=NO
2, , 
*MODAL FILE
*END STEP
************************************************
*STEP
STEP 2: SUBSPACE PROJECTION
*STEADY STATE DYNAMICS,SUBSPACE PROJECTION,INTERVAL=RANGE, FREQUENCY SCALE=LINEAR
0.01,.3,30,0.
*IMPEDANCE,PROPERTY=RAS
1,I2,
*CLOAD
20,1,1.0
20,8,1.0
*NODE PRINT,SUMMARY=NO,NSET=QA_TEST
U1,POR,
*NODE FILE,NSET=QA_TEST
U,POR,
*OUTPUT,HISTORY,OP=NEW
*NODE OUTPUT,NSET=QA_TEST
U,POR,
*OUTPUT,FIELD,OP=ADD,FREQUENCY=99999,VARIABLE=PRESELECT
*END STEP
******************
*STEP
STEP 3: DIRECT
*STEADY STATE DYNAMICS, DIRECT,FREQUENCY SCALE=LINEAR
0.01,.3,30,0.
*IMPEDANCE,PROPERTY=RAS
1,I2,
*CLOAD
20,1,1.0
20,8,1.0
*END STEP