无限大刚性障板上板结构的传声损失计算

榫眼

我用SYSNOISE计算无限大刚性障板上板结构的传声损失时（参照SYSNOISE中实例 12.7 Baffled 模型与透射模型）
总产生下面的问题，不知是什么原因
计算代码：
New Name 'az' Model 1 File az.sdb Return
Option  FEM Frequency Structure Return
Import Mesh Format Patran File example.out Return
Geometry Thickness 0.02
    Elements All
    Return  
Material Shell
    Name 'steel'
    Young 2.1e11  Poisson 0.3  Rho 7850
    Elements All
    Return
Set 10 Name  "Envelope" Envelope
    Elements All
    Return
Set 20 Name  "bb"
    Elements All
    Return
Boundary
    UX Real 0 Imag 0 UY Real 0 Imag 0 UZ Real 0 Imag 0
    RZ Real 0 Imag 0
    Nodes Set 10
    Return  
Modes
    Vector 40 Shift -10 Tolerance 1.0000e-6 Iteration 100 Real
    Return
Save Return
New Name 'hj' Model 2 File hj.sdb Return
Option  BEM Indirect Variational Uncoupled Baffled Frequency  Return
Import Mesh Format Patran File example.out Return
Material Fluid
    Sound Real 3.4000e+002  Rho Real 1.2250e+000
    Return
Set 30 Name  "jj"
    Elements Between  Z  = 0,0
    Return
Point Line  0 0 1 To 0 0 -1 Divide 1 Return  
Source Name 'p' Plane
    Amplitude Real 1 Imag 0
    Position 0 0 5
    Vector 1 1 -1
    Return
Link
    Model 2
    Elements Set 30
    To
    Model 1
    Elements Set 20
    Behavior FLUID-STRUCTURE
    Return
Parameter Model 2
    Physical
    Save Potentials Step 1
    Save Results none
    Store Results none
    Return
    Near 2
    Far 5
    Quadrature 2 2 1
    Positive
    Return
Solve Frequency 50  Return
SYSNOISE 历史记录会标记如下错误：

STRUCTURAL Energy:  0.20428D-07

WARNING *** Velocities are not available for all points
             POWER THROUGH FIELD POINT MESH CANNOT BE CALCULATED

[ 本帖最后由 榫眼 于 2009-3-13 18:18 编辑 ]

榫眼

希望有做过这方面的工作高手帮忙指点一下，谢谢

lhpvibration

很及时啊！