带声源的IBEM 耦合场分析，为何计算后离散声源个数会增多？

xxt0558

带声源的IBEM 耦合场分析，为何计算后离散声源个数会增多？我数了下大概有100个。我是计算声源作用下弹性结构的声辐射，需要将声源reset，而这么多声源如何reset的啊？并且我只定义一个离散声源，无何计算后会出现这么多，很困惑，特寻求帮助。如sys 5.6 example 中是baffled 模型例子。

New Name 'Double Glazed Structure' Model 1 File structure1.sdb Return
Option  FEM Frequency Structure Return
Import Mesh Format Free File structure.fre Return
Check Merge Set Part Return
Set Name  "Envelope" Envelope Return
Geometry Thickness 0.008
    Elements Set 1
    Return
Geometry Thickness 0.010
    Elements Set 2
    Return
Material Shell
    Name 'glass'
    Young 0.1e11  Poisson 0.33  Rho 2000
    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 3
    Return
Save Return
Modes
    Vector 40 Shift -10 Tolerance 1.0000e-6 Iteration 100 Real
    Return
Save Return
New Name 'Double Glazed Window' Model 2 File window1.sdb Return
Option  BEM Indirect Variational Uncoupled Baffled Frequency  Return
Import Mesh Format Free File window.fre Return
Check Mesh Merge Return
Material Fluid
    Name 'air'
    Sound 340  Rho 1.22
    Return
Source Name 'Plane1' Plane
    Amplitude Real 1 Imag 0
    Position 0 0 2
    Vector 3 1 -1
    Return
Set Name  "Upper Leaf"
    Elements Between  Z  = 0.15,0.15
    Return
Set Name  "Lower Leaf"
    Elements Between  Z  = 0,0
    Return
Set Name "Interface"
    Union Set 1 2
    Return
Save Return
Parameter Model 2
    Save Potentials Step 1
    Save Results Step 1
    Near 2
    Far 5
    Quadrature 3 3 2
    Positive
    Return
Link
    Model 2
    Elements Set 3
    To
    Model 1
    Elements All
    Behavior FLUID-STRUCTURE
    Return
Solve Frequency 4 to 140 LinStep 2 Return
Save File window1a.sdb Return
Point Plane -1 0.5 -0.1 To 2.5 0.5 -0.1 Divide 35 To -1 0.5 -2.1 Divide 20 Return
PostProcess
    Points All Frequency 4 To 140 LinStep 2
    Near 2
    Far 5
    Quadrature 3 3 2 Positive
    Save Results Step 1
    Return

w89986581

可能是没有正确使用baffle命令造成的。我建议你用镜像方法替代baffle试试，请搜索讨论baffle那个帖子。