A novel vibration-based method to measure stress in rails

Alireza Enshaeian; Matthew Belding; Piervincenzo Rizzo

doi:10.1117/12.2612296

19 April 2022 A novel vibration-based method to measure stress in rails

Alireza Enshaeian, Matthew Belding, Piervincenzo Rizzo

Proceedings Volume 12048, Health Monitoring of Structural and Biological Systems XVI; 120481C (2022) https://doi.org/10.1117/12.2612296
Event: SPIE Smart Structures + Nondestructive Evaluation, 2022, Long Beach, California, United States

Abstract

This study proposes a noninvasive method to determine the axial load in continuous welded rails using numeric models and field test data. A general finite element model under varying boundary conditions and axial stresses was formulated to predict the natural frequencies of vibration. The model was then validated experimentally by testing a real track in the field. During the experiment, the rail was subjected to the impact of an instrumented hammer and the triggered vibrations were recorded with conventional accelerometers. The accelerations were processed to extract the frequency of the excited modes. Using both empirical data and numeric predictions a loss-function was formulated to estimate the neutral temperature of the rail. Obtained results showed great agreement with measurements conducted by a third independent party that used an approach based on strain gages.

Conference Presentation

Citation Download Citation

Alireza Enshaeian, Matthew Belding, and Piervincenzo Rizzo "A novel vibration-based method to measure stress in rails", Proc. SPIE 12048, Health Monitoring of Structural and Biological Systems XVI, 120481C (19 April 2022); https://doi.org/10.1117/12.2612296

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