Eventos Anais de eventos
CONEM 2018
X Congresso Nacional de Engenharia Mecânica
SENSITIVITY OF THE SIZE AND POSITION OF PIEZOCERAMICS IN THE STRUCTURAL VIBRATIONS PASSIVE CONTROL
Submission Author:
Guilherme Silva Prado , MT
Co-Authors:
Guilherme Silva Prado, Bryan Willy Gonçalves, Heinsten Frederich Leal dos Santos
Presenter: Guilherme Silva Prado
doi://10.26678/ABCM.CONEM2018.CON18-0940
Abstract
This work presents a numerical modelling technique, known as the Finite Element Method, for the analysis and optimization of the best positioning and size of piezoelectric ceramics (PZT5H), which are acting on the control of structural vibrations of a crimped-free beam. These ceramics are connected to a resonant shunt circuit to act in the passive control of the structure, in order to dissipate the generated electric energy coming from the structural vibrations of the beam, where the ceramics are coupled. With the analysis of the frequency responses of the generated systems, for each size variation of the piezoelectric ceramics, it is possible to determine the most efficient size of the ceramics in questions of vibration suppression efficiency. Thus, it was possible to optimize the inductance and resistance values of the electrical circuit associated to the ceramic pad, through a genetic algorithm, to maximize the passive control effect of the system. As a parameter of comparison, a normalization of the output data using the area of the piezoelectric ceramics was done, which demonstrates that the cost function of the optimization does not increase linearly. Therefore, the optimal size and positioning values were found.
Keywords
Vibrations control, Piezoeletric materials, Optimization, Smart Structures
