*HEADING
DERA UNDEX Benchmark Problem 9b
Fluid Coupled Plates, Second Plate Fluid Backed
*NODE,NSET=PLATE1
 1,0.0,0.0,9.6
 2,1.0,0.0,9.6
 3,1.0,1.0,9.6
 4,0.0,1.0,9.6
*NODE,NSET=PLATE2
 5,0.0,0.0,12.8
 6,1.0,0.0,12.8
 7,1.0,1.0,12.8
 8,0.0,1.0,12.8
*NSET,NSET=PLATES
 PLATE1,PLATE2
*NODE,NSET=WATER1
 11,0.0,0.0,0.0
 12,1.0,0.0,0.0
 13,1.0,1.0,0.0
 14,0.0,1.0,0.0
*NODE,NSET=WATER2
 6011,0.0,0.0,9.592102
 6012,1.0,0.0,9.592102
 6013,1.0,1.0,9.592102
 6014,0.0,1.0,9.592102
*NODE,NSET=WATER3
 7001,0.0,0.0,9.607898
 7002,1.0,0.0,9.607898
 7003,1.0,1.0,9.607898
 7004,0.0,1.0,9.607898
*NODE,NSET=WATER4
 9001,0.0,0.0,12.792102
 9002,1.0,0.0,12.792102
 9003,1.0,1.0,12.792102
 9004,0.0,1.0,12.792102
*NODE,NSET=WATER5
 10001,0.0,0.0,12.807898
 10002,1.0,0.0,12.807898
 10003,1.0,1.0,12.807898
 10004,0.0,1.0,12.807898
*NODE,NSET=WATER6
 16001,0.0,0.0,22.4
 16002,1.0,0.0,22.4
 16003,1.0,1.0,22.4
 16004,0.0,1.0,22.4
*NFILL,NSET=WATER
 WATER1,WATER2,600,10
 WATER3,WATER4,200,10
 WATER5,WATER6,600,10
**
**
*ELEMENT,TYPE=S4R,ELSET=PLATE1
 1,1,2,3,4
*ELEMENT,TYPE=S4R,ELSET=PLATE2
 2,5,6,7,8
*ELEMENT,TYPE=AC3D8R,ELSET=WATER
 3,11,12,13,14,21,22,23,24
 1000,7001,7002,7003,7004,7011,7012,7013,7014
 2000,10001,10002,10003,10004,10011,10012,10013,10014
*ELGEN,ELSET=WATER
 3,600,10,1
 1000,200,10,1
 2000,600,10,1
**
**
*SOLID SECTION,ELSET=WATER,MATERIAL=WATER
*SHELL SECTION,ELSET=PLATE1,MATERIAL=STEEL
 0.015796
*SHELL SECTION,ELSET=PLATE2,MATERIAL=STEEL
 0.015796
**
**
*MATERIAL,NAME=STEEL
*ELASTIC
 210.0E9,0.3
*DENSITY
 7850.0,
*MATERIAL,NAME=WATER
*ACOUSTIC MEDIUM
 2.395488E9,
*DENSITY
 1026.0,
**
**
*SURFACE,NAME=END1
 3,S1
*SURFACE,NAME=FLUID1
 602,S2
*SURFACE,NAME=FLUID2
 1000,S1
*SURFACE,NAME=FLUID3
 1199,S2
*SURFACE,NAME=FLUID4
 2000,S1
*SURFACE,NAME=END2
 2599,S2
*SURFACE,NAME=SOLID1
 1,SNEG
*SURFACE,NAME=SOLID2
 1,SPOS
*SURFACE,NAME=SOLID3
 2,SNEG
*SURFACE,NAME=SOLID4
 2,SPOS
**
**
*TIE,NAME=COUPLE
 FLUID1,SOLID1
 FLUID2,SOLID2
 FLUID3,SOLID3
 FLUID4,SOLID4
*BOUNDARY
 PLATES,1,2
**
**
*INCIDENT WAVE PROPERTY,NAME=WAVE,TYPE=PLANE
 0.5,0.5,9.6,
 0.5,0.5,0.0,
*INCIDENT WAVE FLUID PROPERTY
 2.395488E9,1026.0
**
**
*AMPLITUDE,NAME=PULSE,TIME=TOTAL TIME
** Rise time = tau/twenty
.00000D+00,.00000D+00,.62500D-06,.25142D+03,.12500D-05,.10054D+04,.18750D-05,.22613D+04
.25000D-05,.40189D+04,.31250D-05,.62776D+04,.37500D-05,.90369D+04,.43750D-05,.12296D+05
.50000D-05,.16056D+05,.56250D-05,.20314D+05,.62500D-05,.25071D+05,.68750D-05,.30327D+05
.75000D-05,.36080D+05,.81250D-05,.42331D+05,.87500D-05,.49078D+05,.93750D-05,.56322D+05
.10000D-04,.64062D+05,.10625D-04,.72298D+05,.11250D-04,.81028D+05,.11875D-04,.90253D+05
.12500D-04,.99972D+05,.13125D-04,.11019D+06,.13750D-04,.12089D+06,.14375D-04,.13209D+06
.15000D-04,.14378D+06,.15625D-04,.15596D+06,.16250D-04,.16864D+06,.16875D-04,.18180D+06
.17500D-04,.19546D+06,.18125D-04,.20960D+06,.18750D-04,.22424D+06,.19375D-04,.23936D+06
.20000D-04,.25497D+06,.20625D-04,.27107D+06,.21250D-04,.28766D+06,.21875D-04,.30474D+06
.22500D-04,.32230D+06,.23125D-04,.34035D+06,.23750D-04,.35888D+06,.24375D-04,.37790D+06
.25000D-04,.39741D+06,.25625D-04,.41739D+06,.26250D-04,.43787D+06,.26875D-04,.45882D+06
.27500D-04,.48026D+06,.28125D-04,.50219D+06,.28750D-04,.52459D+06,.29375D-04,.54748D+06
.30000D-04,.57084D+06,.30625D-04,.59469D+06,.31250D-04,.61902D+06,.31875D-04,.64383D+06
.32500D-04,.66911D+06,.33125D-04,.69488D+06,.33750D-04,.72113D+06,.34375D-04,.74785D+06
.35000D-04,.77505D+06,.35625D-04,.80273D+06,.36250D-04,.83088D+06,.36875D-04,.85951D+06
.37500D-04,.88862D+06,.38125D-04,.91820D+06,.38750D-04,.94826D+06,.39375D-04,.97879D+06
.40000D-04,.10098D+07,.40625D-04,.10413D+07,.41250D-04,.10732D+07,.41875D-04,.11057D+07
.42500D-04,.11386D+07,.43125D-04,.11719D+07,.43750D-04,.12058D+07,.44375D-04,.12401D+07
.45000D-04,.12749D+07,.45625D-04,.13101D+07,.46250D-04,.13458D+07,.46875D-04,.13820D+07
.47500D-04,.14187D+07,.48125D-04,.14558D+07,.48750D-04,.14934D+07,.49375D-04,.15315D+07
.50000D-04,.15700D+07,.30000D-03,.12227D+07,.55000D-03,.95225D+06,.80000D-03,.74162D+06
.10500D-02,.57757D+06,.13000D-02,.44981D+06,.15500D-02,.35031D+06,.18000D-02,.27283D+06
.20500D-02,.21248D+06,.23000D-02,.16548D+06,.25500D-02,.12887D+06,.28000D-02,.10037D+06
.30500D-02,.78166D+05,.33000D-02,.60876D+05,.35500D-02,.47410D+05,.38000D-02,.36923D+05
.40500D-02,.28756D+05,.43000D-02,.22395D+05,.45500D-02,.17441D+05,.48000D-02,.13583D+05
.50500D-02,.10579D+05,.53000D-02,.82386D+04,.55500D-02,.64162D+04,.58000D-02,.49970D+04
.60500D-02,.38916D+04,.63000D-02,.30308D+04,.65500D-02,.23604D+04,.68000D-02,.18383D+04
.70500D-02,.14317D+04,.73000D-02,.11150D+04,.75500D-02,.86834D+03,.78000D-02,.67627D+03
.80500D-02,.52668D+03,.83000D-02,.41018D+03,.85500D-02,.31945D+03,.88000D-02,.24878D+03
.90500D-02,.19375D+03,.93000D-02,.15090D+03,.95500D-02,.11752D+03,.98000D-02,.91523D+02
.10050D-01,.71278D+02,.10300D-01,.55511D+02,.10550D-01,.43232D+02,.10800D-01,.33669D+02
**
**
*STEP
*DYNAMIC,EXPLICIT
 ,6.0E-3
*INCIDENT WAVE,PROPERTY=WAVE,PRESSURE AMPLITUDE=PULSE
 SOLID1,1.0
 FLUID1,1.0
*SIMPEDANCE
 END1,
 END2,
*BULK VISCOSITY
 0.02, 0.5
*OUTPUT,FIELD
*NODE OUTPUT
 U,
*OUTPUT,HISTORY,TIME INTERVAL=3.0E-5
*NODE OUTPUT,NSET=PLATES
 U,V
*END STEP