Comparison of Vibration and Acoustic Pressure Reduction Using Different Types of Piezo actuators

Abstract

This paper presents results of numerical simulations on reduction of sound pressure radiated from a square plate using different types of piezo actuators. For this purpose a FEM model was developed using ANSYS software with said steel plate with a hemisphere of air on one side of the plate. There are two criteria by which the reduction is measured: minimising vibrations of plate area and minimising sound pressure on a half sphere surrounding the plate. Changes in the results for both the radiated sound pressure and plate vibration are discussed.

Impact of the size of the sensor part on sensor-actuator efficiency

“…After some refining improved models and some analytical analyses were presented (Wiciak and Trojanowski, 2014). Another improvement was introducing the acoustic surrounding of the analysed plate (Wiciak and Trojanowski, 2015a). These works generally concluded that the introduced change in material properties of piezo actuators did not produce any substantial change in the levels of reduction of plates vibration.…”