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II.
How To Use ATILA
5.3
Metal-Tube USM (2)
BOUNDARY
CONDITIONS MESHING
PROBLEM
- Metal tube: Brass OD = 2.4 mm f,
ID = 1.8
mm f x
5 mm L; PZT 4: 0.3 mm t x 1 mm x 5 mm |
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BOUNDARY
CONDITIONS
Polarization/Local
Axes
Data -> Conditions -> Volumes -> Geometry
-> Polarization
(Cartesian) -> Define Polarization (P1) (-1,0,0) direction
Choose 3PointsXZ -> Center (0,0,0) -> Define
X axis by putting (0,1,0) -> Then define Z axis by putting (-1,0,0)
-> Escape
Define Polarization (P2) (0,1,0) direction Choose 3PointsXZ -> Center (0,0,0) -> Define
X axis by putting (-1,0,0) -> Then define Z axis by putting (0,1,0)
-> Escape
Assign Polarization (Local-Axes P1) -> Choose the
PZT volume -> Assign Polarization (Local-Axes P2) -> Choose
the PZT volume - > Finish
You may choose -
X and Angle: Pick 2 Points for Center and X, and
Y with angle
Potential
Data -> Conditions -> Surfaces -> Potential
0.0 (or Ground in ATILA 5.2.4 or higher version) -> Assign the
metal side surface of the PZT -> Forced Potential 1.0 -> Assign
the top surface
Only one PZT plate is driven with keeping
the other PZT plate short-circuited.
MESHING 
Meshing -> Structured -> Volumes -> Select
all volumes -> Then
Cancel the further
process
Meshing -> Structured -> Lines -> Enter
number to divide
line -> Generate
Use the higher number such as
2 or 4 for the higher accurate calculation.

Structured Mesh (Recommended)
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Free Mesh (Not Recommended)
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