Eventos Anais de eventos
CONEM 2018
X Congresso Nacional de Engenharia Mecânica
Experimental investigation of the wave propagation in beams undergoing flexural vibration
Submission Author:
Pedro Henrique de Melo Casado Matos , DF , Brazil
Co-Authors:
Daniely Amorim das Neves, Pedro Henrique de Melo Casado Matos, Adriano Todorovic Fabro
Presenter: Daniely Amorim das Neves
doi://10.26678/ABCM.CONEM2018.CON18-0392
Abstract
The wave appoach in structural dynamics focus in local properties such as the dispersion relations, phase and group velocitties, wave modes and energy transmission. This is in contrast to the modal approach, which typically focus in global properties such as the natural frequencies and modes shapes. Experimental technics for modal analysis are well stablished and have been sucessfully applyied in the past decades unlike the experimental approaches for wave propagation. This paper aims to investigate some experimental approaches for the identification of the wavenumber in beams undergoing flexural vibration. The underlying experimental setup consists of measuring frequency response functions by an impact hammer test from a clamped-free beam at evenly spaced points. The influence of measurement points distance, positioning along the beam are investigated and the upper and lower limits of the frequency band for the analysis are given. Results are compared to an available analytical solution and showed good agreement.
Keywords
wavenumber, wave propagation, Experimental approach
