-
ANSYS
静电场分析例
(
非常好
)
As
shown
below,
you
can
use
GUI
menu
paths
to
perform
the
example
analysis
of creating a Trefftz domain to solve
an open boundary problem in
electrostatics.
Step 1:
Start the Analysis
1.
Activate the ANSYS launcher.
2.
Select the
ANSYS simulation environment, choose your license,
and
click
Run
.
3.
When the
Graphical User Interface is fully active, choose
Utility
Menu> File> Change
Title
. A dialog box appears.
4.
Enter the
title text, Sphere to Infinity Capacitance
5.
Click on OK.
6.
Choose
Main Menu> Preferences
.
The
Preference dialog
box appears.
7.
Click
Electric
on.
8.
Click on
OK.
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Step 2: Define Analysis Parameters
1.
Choose
menu
path
Utility
Menu>
Parameters> Scalar
Parameters
.
The
Parameters dialog box appears.
2.
Type in the
parameter values shown below. (Press ENTER after
entering each value.)
n = 5
r1 = 100
r2 = 300
r3 = 125
3.
Click on Close to close the dialog box.
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Step 3: Define Element Types
1.
Choose
Main
Menu>
Preprocessor>
Element
Type>
Add/Edit/Delete
.
The
Element Types dialog box
appears.
2.
Click
on Add. The Library of Element Types dialog box
appears.
3.
In
the scrollable fields, click on (highlight)
Electrostatic and
3D Tet 123
(
SOLID123
).
4.
Click on OK.
ANSYS returns you to the Element Types dialog box.
5.
Click on Close
to close the Element Types dialog box.
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Step
4: Define Material Properties
1.
Choose
Main
Menu>
Preprocessor>
Material
Props>
Electromag
Units
.
The
Electromagnetic Units dialog box appears.
2.
Select the
User-Defined option button and click on OK. A
Electromagnetics Units text entry box
appears.
3.
Enter
8.854e-6 for the free-space permittivity
(
μ
MKSV units) and
click on OK.
4.
Choose
Main Menu>
Preprocessor> Material Props> Material
Models
.
The Define Material
Model Behavior dialog box appears.
5.
In the
Material Models Available window, double-click on
the
following options:
Electromagnetics, Relative Permittivity,
Constant. A dialog box appears.
6.
Enter
1
for
PERX
(Relative
permittivity),
and
click
on
OK.
Material
Model
Number
1
appears
in
the
Material
Models
Defined
window
on
the
left.
7.
Choose
menu
path
Material>Exit
to
remove
the
Define
Material
Model
Behavior dialog box.
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Step
5: Create Solid Model
1.
Choose
Main
Menu>
Preprocessor>
Modeling>
Create>
Volumes>
Sphere>
By
Dimensions
.
The
Create
Sphere
by
Dimensions
dialog
box
appears.
2.
In
th
e “RAD1” field, enter r1, in the
“RAD2” field, enter 0,
in the “THETA1”
field, enter 0, in the “THETA2” field, enter
90, and click on OK.
3.
Choose
Utility Menu> PlotCtrls> Pan, Zoom,
Rotate
. A
Pan-Zoom-Rotate
dialog box appears.
4.
Click on the Iso button, then click on
Close. The ANSYS Graphics
Window
displays the block.
5.
Choose
Main
Menu>
Preprocessor>
Modeling>
Create>
Volumes>
Block>
By
Dimensions
. The create Block by
Dimensions dialog box appears.
6.
In the “X
coordinates” field, enter 0, r2, in the “Y
coordina
tes”
field,
enter
0,
r2,
and
in
the
“Z
coordinates”
field,
enter 0, r2.
7.
Choose
Main Menu>
Preprocessor> Modeling> Operate> Booleans>
Subtract> Volumes
. The
Subtract Volumes picking menu appears.
8.
Pick
(or
enter
in
the
picker)
the
block
volume
(volume
2)
and
click
on OK. The Subtract
Volumes picking menu reappears.
9.
Pick (or enter
in the picker) the spherical volume (volume 1) and
click on OK.
Main Menu> Preprocessor> Modeling>
Reflect> Volumes
. The
Reflected Volumes picking menu appears.
on Pick All. The Reflected Volumes
dialog box appears.
that the Y-Z plane
is selected and click on OK.
Main Menu> Preprocessor> Modeling>
Reflect> Volumes
. The
Reflected Volumes picking menu appears.
on Pick All. The Reflected Volumes
dialog box appears.
the X-Z plane and
click on OK.
Main Menu>
Preprocessor> Modeling> Reflect>
Volumes
. The
Reflected
Volumes picking menu appears.
on Pick
All. The Reflected Volumes dialog box appears.
the X-Y plane and click on OK.
Main Menu> Preprocessor>
Numbering Ctrls> Merge Items
. A
Merge
Coincident
or
Equivalently
Defined
Items
dialog
box
appears.
20.
Set
the “Type of Item to be merge (Label)” to All and
click on
OK.
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Step
6: Mesh the Model and Create a Finite Element
Model Component
1.
Choose
Main Menu>
Preprocessor> Meshing> MeshTool
. The
MeshTool
appears.
2.
Click
on
the
Set
Global
Size
Controls
button.
A
Global
Element
Sizes
dialog box appears.
3.
In
the
“No.
of
Element
Divisions
(NDIV)”
field,
enter
n,
and
click
on OK.
4.
Make
sure
that
Volumes,
Tet,
and
Free
are
selected
in
the
MeshTool.
5.
Click MESH.
The Mesh Volumes picking menu appears.
6.
Click
on
Pick
All.
The
display
changes
to show
the
meshed
volumes.
Click Close to
close the MeshTool.
7.
Choose menu path
Utility
Menu> Select> Comp/Assembly> Create
Component
. The Create
Component dialog box appears.
8.
In the
“Component Name (Cname)” field enter vol, set the
“Component is made of (Entity)” to
volumes, and click on OK.