Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
Evaluation of pipe silencers efficiency with internal geometry optimized for noise control in specific frequency ranges using the finite element technique
Submission Author:
Beatriz Marangoni , MG
Co-Authors:
Israel Jorge Cardenas Nunez, Ricardo Humberto de Oliveira Filho, Beatriz Marangoni
Presenter: Beatriz Marangoni
doi://10.26678/ABCM.COBEM2017.COB17-2097
Abstract
This paper presents a numerical analysis of the performance of an acoustic muffler. The goal was to establish the best configuration for the installation of two barriers, modifying the internal geometry of the muffler. To find a setting that maximizes the sound transmission loss (TL) was used a routine of optimization with genetic algorithms and simulations was conducted to assess the behavior of muffler through the finite element method. For the numerical analysis was necessary to establish some initial conditions, such as input sound pressure, impedance and use an anechoic termination in the tube. We evaluated two functions goal in an optimization routine, the first seeking the maximum value of TL and the other by maximizing the area of the curve below the TL. Despite the expectation of obtaining different results, both methods achieved results very closely, even in processing time and the sound attenuation of the muffler was actually improved in a frequency range from pre-established.
Keywords
Transmission Loss, Numerical analysis, Optimization, Acoustic Muffler
