*HEADING
**
** Shell Nodes
**
*NODE
*NGEN,NSET=SPHERE_I,LINE=C
*NGEN,NSET=SPHERE_E,LINE=C
*NSET,NSET=SYMM
**
** Water Nodes
**
*NODE
*NGEN,NSET=IWI,LINE=C
*NGEN,NSET=IWO,LINE=C
*NGEN,NSET=OWI,LINE=C
*NGEN,NSET=OWO,LINE=C
*NFILL,NSET=WATER
 IWI,IWO,10,200
 OWI,OWO,100,100
**
** Shell Elements
**
*ELEMENT,TYPE=SAX1
*ELGEN,ELSET=SPHERE_I
*ELGEN,ELSET=SPHERE_E
*SHELL SECTION,ELSET=SPHERE_I,MATERIAL=STEEL
 0.016,
*SHELL SECTION,ELSET=SPHERE_E,MATERIAL=STEEL
 0.004,
**
** Water Elements
**
*ELEMENT,TYPE=ACAX4R
*ELGEN,ELSET=IWATER
*ELGEN,ELSET=OWATER
*SOLID SECTION,ELSET=IWATER,MATERIAL=WATER
 1.0,
*SOLID SECTION,ELSET=OWATER,MATERIAL=WATER
 1.0,
*ELSET,ELSET=IWI,GENERATE
*ELSET,ELSET=IWO,GENERATE
*ELSET,ELSET=OWI,GENERATE
*ELSET,ELSET=OWO,GENERATE
**
**
*MATERIAL,NAME=STEEL
*DENSITY
 7765.,
*ELASTIC
 2.246E+11, 0.3
*MATERIAL,NAME=WATER
*ACOUSTIC MEDIUM
*DENSITY
 997.,
**
**
*SURFACE,NAME=SOLID1
 SPHERE_I,SPOS
*SURFACE,NAME=SOLID2
 SPHERE_E,SPOS
*SURFACE,NAME=SOLID3
 SPHERE_E,SNEG
*SURFACE,NAME=FLUID1
 IWI,S4
*SURFACE,NAME=FLUID2
 IWO,S2
*SURFACE,NAME=FLUID3
 OWI,S4
*SURFACE,NAME=OUTER
 OWO,S2
**
**
*TIE,NAME=COUPLE
 FLUID1,SOLID1
 FLUID2,SOLID2
 FLUID3,SOLID3
**
**
*AMPLITUDE,NAME=UNDEX,DEFINITION=TABULAR,TIME=TOTAL TIME
 0.0,0.0,1.0E-6,1.0,1.0,1.0
**
**
*INCIDENT WAVE PROPERTY,NAME=WAVE,TYPE=PLANE
*INCIDENT WAVE FLUID PROPERTY
*IMPEDANCE PROPERTY,TYPE=SPHERE,NAME=QUIET
**
**
*BOUNDARY
 SYMM,1,1
 SYMM,6,6
**
** ----------------------------------------------------------------
**
**
*STEP
*DYNAMIC,EXPLICIT,DIRECT USER CONTROL
 1.0E-7,0.0106
*INCIDENT WAVE,PROPERTY=WAVE,PRESSURE AMPLITUDE=UNDEX
 SOLID3,1.0E6
 FLUID3,1.0E6
*SIMPEDANCE
 OUTER,QUIET
*BULK VISCOSITY
*OUTPUT, FIELD
*NODE OUTPUT
 U,POR
*ELEMENT OUTPUT
 S,E
*OUTPUT,HISTORY,TIME INTERVAL=1.06E-4
*NODE OUTPUT,NSET=SYMM
 U,V
*END STEP