Brass
Bar L = 46 mm, t = 2.5 mm Leg
L = 10 mm, t = 2 mm PZT
4 L = 11.5 mm, t = 1 mm
One of the most famous linear motors
Learn how to apply sine and cosine voltages
PROBLEM
TYPE
Data
-> Problem data -> 2D, Harmonic, Click both
Compute Stress and Include Losses
Choose Class = PLSTRAIN in this
case.
FREQUENCY
Data
-> Harmonic -> Interval 1 (10000-110000 Hz)
CALCULATION
Calculate -> Calculate window -> Start
POST
PROCESS/VIEW RESULTS
Click
for Opening the Post Calculation (Flavia) Domain
Click Admittance/Impedance
Result
Admittance Peak Points : 64000 Hz and 76000 Hz -> These
peaks corresponds to the Fourth Bending and the First Longitudinal
Resonance Modes
Admittance Curve
View Animation - Vibration
Mode at a Particular Frequency
View results -> Default Analysis/Step
-> Harmonic-Magnitude -> Set a Frequency
(Peak Point : 64000 Hz for Resonance Mode) Double Click Loading
frequency: 64000 Hz Harmonic Case -> Click OK (Single
Click and Wait for a while!)
Set Deformation
-> Displacement
View results -> Deformation -> Displacement
Other parameter than Displacement
Set Results View -> View results
-> Contour Fill -> Electric Potential or Von
Mises Stress
After setting both “Results view” and “Deformation” -> Click to
see the Animation
64000 Hz - Resonance
76000 Hz - Resonance
When we drive
this actuator at the intermediate frequency of these
two resonances
(72 kHz), we obtain the superposed
elliptical locus at the tip. This is used as a linear
ultrasonic
motors