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问题是这样:我想研究下回声的影响,结构模型是一个长方体受激励的机器,而流体模型也是一个长方体的模型,以模拟一个厂房,厂房的四周的吸声系数设置为0。01(注:厂房的中间除去了机器长方体的所占的空间)。
我用的方法是:FEM结构+Indirect BEM流体,结构的响应是通过导入模态得到,然后建立结构与流体的连接,以下是我的计算命令流及响应文件,为什么在计算到中间就会发生如下错误,然后就自动退出呢,请多多指教,谢谢!
附:
1 命令流:
New Name 'machine' Model 1 File machine.sdb Return
Option FEM Frequency Structure Return
Import Mesh Format Free File machine_model Return
Extract Nodes All Return
Import Modes Structure Format Free File modefile_ansys.fre Return
Damping Mode 1 KSI: 0.000000 Return
Damping Mode 2 KSI: 0.000000 Return
Damping Mode 3 KSI: 0.000000 Return
Damping Mode 4 KSI: 0.000000 Return
Damping Mode 5 KSI: 0.000000 Return
Damping Mode 6 KSI: 0.000000 Return
Damping Mode 7 KSI: 0.000000 Return
Damping Mode 8 KSI: 0.000000 Return
Damping Mode 9 KSI: 0.000000 Return
Damping Mode 10 KSI: 0.000000 Return
Boundary
FX Real -100 Imag 0
Nodes 243
Return
Boundary
FY Real -100 Imag 0
Nodes 198
Return
Boundary
FZ Real -100 Imag 0
Nodes 97
Return
Boundary
FX Real 100 Imag 0
Nodes 228
Return
Boundary
FY Real 100 Imag 0
Nodes 143
Return
Save Return
New Name 'air' Model 2 File air.sdb Return
Option BEM Indirect Variational Uncoupled Unbaffled Frequency Return
Import Mesh Format Free File air_min Return
Material Fluid
Name 'air'
Sound Real 3.4000e+002 Rho Real 1.2250e+000
Return
Set 1 Name "machine"
Elements x=-0.5,x=0.5,y=-0.2,y=0.2,z=0.4,z=1
Return
Set 2 Name "air"
Elements x=-5,x=5,y=-4,y=4,z=0,z=4
Return
Boundary Impedance Real 41500 Imag 0
Elements Set 2
Return
Link
Model 1
Elements all
To
Model 2
Elements Set 1
Behavior FLUID-STRUCTURE
Return
Point Plane -0.6 -0.3 0.2 To 0.6 -0.3 0.2 Divide 10 To -0.6 -0.3 1.2 Divide 10 Return
Parameter Model 2
Physical
Save Potentials Step 1
Save Results none
Store Results
Points all
Return
Near 2
Far 5
Quadrature 2 2 1
Positive
Return
Parameter Model 1
Vector 10
Save Displacements Step 1
Store Displacements none
Return
Return
Solve
Frequency 200
Return
2。响应:
GENERATING OUT-OF-CORE MATRIX STRUCTURE
Block # 1 Eq # 1 to 4626 Size 10847556
。。。。。。(中间省略)
Block # 44 Eq # 30503 to 30652 Size 4590888
In-core Block Size : 64
Out-of-core Block Size : 10852120
Number Out-of-core Blocks : 44
USING SOLVER 7
Occupied space: 99816130 words ( 99.82 %)
This node (MAO) has number 0
ANALYSIS NUMBER 1 / 1 FREQUENCY = 200.000 Hz
------------------------------------------------------------------------
CPU Stats --- Delta: 0:01:50 ( 109.91) Total: 0:02:02 ( 121.78)
Assembling structural model
Generating structural load vector for load case 1
Assembling Structural Right-Hand-Side vector
Generating acoustic load vector for load case 1
SELECTING THE OUT-OF-CORE SOLVER
FORMATION OF SYSTEM (OUT-OF-CORE)
Building block # 1 to 2
Generating Velocity / Velocity Contribution
CPU Stats --- Step: 0:06:32 ( 391.86) Total: 0:08:34 ( 513.64)
。。。。。。(中间省略)
Building block # 23 to 24
Generating Velocity / Velocity Contribution
CPU Stats --- Step: 1:26:53 ( 5212.59) Total: 1:28:54 ( 5334.37)
Building block # 25 to 26 (:@Q 为什么计算到这就会发生以下的错误呢)
Generating Velocity / Velocity Contribution
*** ERROR 38 WRITING RECORD # 262144 BLOCK # 25
A FATAL ERROR OCCURRED. PROGRAM STOPPED
PROGRAM SYSNOISE Rev 5.5 Windows NT 30NOV2000 DATE: 17-MAY-2008 23:35:46
CPU Stats --- Delta: 1:33:37 ( 5617.17) Total: 1:35:39 ( 5738.95) |