II. How To Use ATILA

5.2 P-Shape USM (3)
PROBLEM TYPE VIEW RESULTS


PROBLEM - L1B4 Type USM 2D Model :

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
72000 Hz - Resonance