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shock_isolator

斑竹你好，我在声学建模时遇到了问题不知如何解决，请斑竹或者哪位高手能够指点一下，谢谢！
我的问题是在一个水箱中放置一个换能器，当换能器以2000Hz工作时，求解水箱中的声场分布。其中有关吸声系数的设置只是典型值，可能并不准确。
声场建立后能够求解，但结果显示水箱中的声场分布处处为0。由于对于声场的一些问题与ANSYS的命令的结合了解不是很深，所以我也分析不出问题处在哪里，特向各位高手求教，希望谁能指点一下，这里先谢谢大家了！

以下是命令流

/TITLE,WATER-TANK
/TRIAD,OFF

DIV1=5E-3
DIV2=10E-3
DIV=15E-3
A=160E-3
B=200E-3
C=400E-3
RAD=40E-3
RAD1=RAD+DIV1
RAD2=RAD-DIV1
L=150E-3

/PREP7
ET,1,FLUID30,,1
ET,2,FLUID30

MP,DENS,1,0.98E3
MP,SONC,1,1483
MP,MU,1,0.0 ! WATER

WPOFFS,0,RAD,0
PCIRC,RAD,0,-90,90
PCIRC,RAD1,0,-90,90
PCIRC,RAD2,0,-90,90
WPAVE,0,0,0
RECTNG,0,A,0,B
RECTNG,0,A,0,DIV1

AOVLAP,ALL
ADELE,7,,,1
AADD,8,10
LSTR,18,19
AS*BL,1,1
AADD,2,11
LSTR,3,19
AS*BL,9,2
LDEL,2
AADD,2,3

VEXT,ALL,,,0,0,DIV2,

LSEL,S,,,48 $LSEL,A,,,49 $LSEL,A,,,12 $LSEL,A,,,36
LESIZE,ALL,,,DIV,,,,,1

LSEL,S,,,46 $LSEL,A,,,47 $LSEL,A,,,51 $LSEL,A,,,52 $LSEL,A,,,13 $LSEL,A,,,14
$LSEL,A,,,22 $LSEL,A,,,38 $LSEL,A,,,39 $LSEL,A,,,15 $LSEL,A,,,10 $LSEL,A,,,24
LESIZE,ALL,DIV2,,,,,,,1

LSEL,S,,,18 $LSEL,A,,,19 $LSEL,A,,,40 $LSEL,A,,,41
LESIZE,ALL,,,8,,,,,1
$LSEL,S,,,5 $LSEL,A,,,17 $LSEL,A,,,6 $LSEL,A,,,8 $LSEL,A,,,27 $LSEL,A,,,31
LESIZE,ALL,,,16,,,,,1

LSEL,S,,,1 $LSEL,A,,,4 $LSEL,A,,,7 $LSEL,A,,,9 $LSEL,A,,,16 $LSEL,A,,,20
$LSEL,A,,,23 $LSEL,A,,,25 $LSEL,A,,,26 $LSEL,A,,,30 $LSEL,A,,,32 $LSEL,A,,,44
LESIZE,ALL,,,1,,,,,1

LSEL,S,,,3 $LSEL,A,,,21 $LSEL,A,,,29 $LSEL,A,,,37
LESIZE,ALL,DIV1,,,,,,,1
ALLS

VSWEEP,ALL

VGEN,(C-L)/DIV2,ALL,,,,,DIV2
VSEL,S,,,1
VSEL,A,,,5,6
VGEN,L/DIV2+1,ALL,,,,,-DIV2
ALLS

VSYMM,X,ALL, , , ,0,0
NUMMRG,ALL, , , ,LOW

!(设定材料参数)
MP,DENS,2,0.98E3
MP,SONC,2,1483
MP,MU,2,0.90 ! (BETA) ABSORPTION COEFFICIENT OF THE WATER-AIR INTERFACE

MP,DENS,3,0.98E3
MP,SONC,3,1483
MP,MU,3,0.0 ! (BETA) ABSORPTION COEFFICIENT OF THE TRANSDUCER

MP,DENS,4,0.98E3
MP,SONC,4,1483
MP,MU,4,0.04 ! (BETA) ABSORPTION COEFFICIENT OF THE FLOOR AND WALLS

LOCAL,11,1,0,RAD,0
NSEL,S,LOC,X,RAD-RAD/10,RAD
NSEL,R,LOC,Z,0,-L
ESLN
TYPE,2
MAT,3
EMODIF,ALL
SF,ALL,IMPD,1
D,ALL,UX,,,,,UY,UZ
CM,TRANS-FIX,NODE

NSEL,S,LOC,X,0,RAD-RAD/10
NSEL,R,LOC,Z,0
ESLN
ESEL,U,TYPE,,2
TYPE,2
MAT,3
EMODIF,ALL
SF,ALL,FSI ! SPECIFY TRANSDUCER SURFACE AS FLUID-STRUCTURE INTERFACE
D,ALL,UZ,0.01E-3 ! LONGITUDINAL VIBRATION AMPLITUDE OF VIBRATING SURFACE
D,ALL,UX,,,,,UY
CM,TRANS-FS,NODE

CSYS,0
NSEL,S,LOC,Y,0
NSEL,A,LOC,Z,C-L
NSEL,A,LOC,Z,-L
NSEL,A,LOC,X,-A
NSEL,A,LOC,X,A
ESLN
SF,ALL,IMPD,1
D,ALL,UX,,,,,UY,UZ ! CONSTRAIN ALL DISPLACEMENTS TO ZERO AT THE WALLS
CM,WALLS,NODE
CM,WALLS,ELEM

NSEL,S,LOC,Y,B
NSEL,R,LOC,X,-A+A/40,A-A/40
NSEL,R,LOC,Z,-L+C/50,C-L-C/50
ESLN
ESEL,U,ENAME,,WALLS
TYPE,2
MAT,2
EMODIF,ALL ! WATER TO AIR
D,ALL,PRES,0.0
CM,WATER-AIR,NODE

ALLS
FINISH

/SOLU
HARF,2000,2000 ! FREQUENCY OF EXCITATION = 2000 HZ
SOLVE
FINISH

zhaodaibin

我遇到一个热学方面的问题：
模型是一个旋转的钢辊，在圆周上某一段弧上有一个接触热源，热源是不动的。现分析辊子动起来后，表面的温度分布。
我用的单元是thermal的，但不知道怎么实现辊子的转动，请大家赐教。
不胜感激。