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

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

Mapped Mesh

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)

Free Mesh (Not Recommended)