Eventos Anais de eventos
COBEM 2019
25th International Congress of Mechanical Engineering
Analysis on the longitudinal wave propagation in rods with discontinuities
Submission Author:
Bruna Spila de Lucca , SP , Brazil
Co-Authors:
Bruna Spila de Lucca, Douglas Bueno
Presenter: Bruna Spila de Lucca
doi://10.26678/ABCM.COBEM2019.COB2019-1317
Abstract
Structural vibration suppression has been the focus of several researches, mainly for developing high performance mechanical systems. Besides classical techniques, which usually involve passive, semi-active and active approaches, the use of periodicity concept for physical and geometric properties is an interesting alternative to get efficient design of systems for several problems. In general, periodic structures are composed by cells and the analysis of waves propagation is a fundamental task for specifying physical and geometric parameters to define the structure. In this sense, in this research is proposed to study the longitudinal transmitted and reflected waves in a structure composed by both left and right homogeneous parts and an intermediate part with periodic cell. Different geometric configurations and combinations of materials are evaluated through an analytical formulation written in the frequency domain to understand the relations between transmitted and reflected waves amplitudes in respect to the incident one. Based on these analysis are characterized the effects of stop band and pass band for different conditions.
Keywords
periodic structures, combined materials, wave propagation, vibration supression
