Dynamic Performance of a Steel Road Sign with Multi-Material Electronic Signboard Under Mining-Induced Tremors from Different Mining Areas: Experimental and Numerical Research
Paweł Boroń, Joanna Maria Dulińska
TL;DR
This study examines how a road sign with an electronic board behaves during mining tremors, showing that frequency matching affects its performance more than tremor strength.
Contribution
The study provides new insights into the dynamic behavior of multi-material electronic signboards under mining-induced tremors.
Findings
Frequency matching between tremor and signboard natural frequencies significantly affects dynamic response more than peak ground acceleration.
The Szombierki tremor caused higher stress and displacement than the Moskorzyn tremor despite lower peak ground acceleration.
The electronic multi-material signboard did not show plastic deformation, confirming its safety in mining areas.
Abstract
This study investigates the dynamic performance of a road sign equipped with a multi-material electronic signboard subjected to mining-induced seismic tremors. The key innovative aspect lies in providing new insights into the dynamic performance of multi-material electronic signboards under high-energy mining tremors, enhancing their safety assessment in mining areas. Experimental modal analysis and finite element analysis were conducted, and the numerical model of the sign was calibrated by adjusting ground stiffness to align experimental and computational data. The fundamental natural frequencies and their corresponding mode shapes were identified as 2.75 Hz, 3.09 Hz, 8.46 Hz, and 13.50 Hz. Numerical results were validated using MAC methods, demonstrating strong agreement with experimental values and confirming the accuracy of the numerical predictions. Damping ratios of 3.79% and…
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Taxonomy
TopicsStructural Health Monitoring Techniques · Structural Response to Dynamic Loads · Structural Engineering and Vibration Analysis