Civil Research Talks | Emrah Erduran | Identification of Railway Bridge Frequencies from Train-Mounted Sensors

Emrah Erduran | Associate Professor, Department of Built Environment
Oslo Metropolitan University, Oslo, Norway

May 11, 2023 | 10h30-11h30 (Lisbon Time) | 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.