II. How To Use ATILA

6.1 Langevin Type Transducer (3)
PROBLEM TYPE VIEW RESULTS


PROBLEM - Langevin Transducer 50 mm f x 40 mm t (Two PZT 8 disks with 50 mm f x 1 mm t are sandwiched by two Steel 1 blocks with 50 mm f x 19 mm thickness ); 2D Axisymmetric with 1/2 portion

  • Simplest underwater transducer
  • Learn how to use a small sample to a low frequency applicaiton
  • Learn the underwater sound propagation

PROBLEM TYPE

Data -> Problem data -> 2D, Axisymmetric, Harmonic, Click both Compute Stress and Include Losses

FREQUENCY

Data -> Harmonic -> Interval 1 (20000-100000 Hz), Interval 2 (45-55 kHz)

CALCULATION

Calculate -> Calculate window -> Start

POST PROCESS/VIEW RESULTS

Click for Opening the Post Calculation (Flavia) Domain

Click Admittance/Impedance Result

To find the exact resonance frequency, Click "Show Values".

Admittance Peak Point : 52000 Hz -> This peak corresponds to the First Resonance

Admittance Curve
Admittance Value Results

View Animation - Vibration Mode at a Particular Frequency

View results -> Default Analysis/Step -> Harmonic-Magnitude -> Set a Frequency
(Peak Point : 52000 Hz for Resonance Mode)
Double Click Loading frequency: 52000 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 Lines -> Fluid Pressure
After setting both “Results view” and “Deformation” -> Click to see the Animation
52000 Hz - Resonance