Notícias
Civil Research Talks: Identification of Railway Bridge Frequencies from Train-Mounted Sensors | Prof. Emrah Erduran
Speaker: Emrah Erduran | Associate Professor, Department of Built Environment, Oslo Metropolitan University, Norway
Date: May 11, 2023 | 10h30-12h00 | Room U.0.6 | https://videoconf-colibri.zoom.us/j/93285885760 Lusófona University, Lisbon, Portugal
Abstract: Using vehicle-mounted sensors to identify vibration frequencies of bridges provides an attractive alternative to classical monitoring techniques that require separate sensors and data acquisition systems. In this talk, we will summarize a study where we used continuous wavelet transform to distinguish the bridge frequencies from the other peaks that are visible in the Fourier amplitude spectrum of the accelerations recorded on train bogies. For this, a detailed three-dimensional finite element model that can capture the vibration characteristics of the bridge, track, and train is created, and each component of the model is separately validated. The train model used is a three-dimensional multi-degree-of- freedom system that can simulate the pitching and rolling behavior. The train was then virtually driven over the bridge at different speeds and under varying track irregularities to evaluate the robustness of the proposed method in extracting bridge frequencies from train-mounted sensors under different conditions.
Short Bio: Emrah Erduran is an associate professor of structural engineering at the Oslo Metropolitan University. His research is in the field of structural dynamics and its application in structural health monitoring. He is visiting Faculty of Engineering of the Lusófona University to develop research collaboration in the field of structural health monitoring.
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