II. How To Use ATILA

5.3 Metal-Tube USM (3)
PROBLEM TYPE VIEW RESULTS


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

PROBLEM TYPE

Data -> Problem data -> 3D, Harmonic, Click both Compute Stress and Include Losses

FREQUENCY

Data -> Harmonic -> Interval 2 (170000-220000 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 : 207.4 kHz and 208.4 kHz -> These peaks correspond to the First split Resonances

Admittance Curve

View Animation - Vibration Mode at a Particular Frequency

View results -> Default Analysis/Step -> Harmonic-Magnitude -> Set a Frequency
(Peak Point : 207400 Hz or 208400 Hz for the Resonance Mode)
Double Click Loading frequency: 207400 or 208400 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 -> Von Mises Stress
After setting both “Results view” and “Deformation” -> Click to see the Animation
207400 Hz - First Lower Resonance
208400 Hz - First Higher Resonance

When we drive at the intermediate frequency, we obtain the superposed "hula-hoop" mode, which can be used as a rotary ultrasonic motor.

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