Eventos Anais de eventos
COBEM 2019
25th International Congress of Mechanical Engineering
Operational Modal Analysis of a Footbridge
Submission Author:
Lucas de Sant’Anna Vitor Barbieri , PR
Co-Authors:
Lucas de Sant’Anna Vitor Barbieri, Nilson Barbieri, Elsa Caetano
Presenter: Lucas de Sant’Anna Vitor Barbieri
doi://10.26678/ABCM.COBEM2019.COB2019-1347
Abstract
The article describes the use of an automatic modal analysis system applied to a footbridge. The objective is to use the continuous monitoring data to perform an automatic analysis of the modal properties of the structure with the least possible human influence. In this work, the method chosen was the Data-Driven Stochastic Subspace Identification method. In order to clean the stabilization diagram, the Modal Phase Collinearity and Modal Assurance Criterion parameters applied to a MATLAB hierarchical clustering routine were used. The results show a good agreement of the first ten modes of the structure identified by the monitoring system and the finite element model for a 24-hour analysis of data, separated in 1-hour duration series.
Keywords
Operational Modal Analysis, signal processing, dynamics, Vibrations
