Numerical analysis on characteristics of acoustic emission signals in bridge cables based on semi-analytic FEM

Journals

Title：
Numerical analysis on characteristics of acoustic emission signals in bridge cables based on semi-analytic FEM
Author：
Yaohua Yang¹, Limin Sun²
Author Affiliation：
1. Department of Bridge Engineering, Tongji University, Shanghai, China
2. State Key Laboratory for Disaster Reduction in Civil Engineering, Tongji University, Shanghai, China
Received：Apr.12, 2022
Accepted：Jun.13, 2022
Published：Jun.28, 2022

Abstract

Acoustic emission (AE) signal, actually, is the phenomenon of stress wave propagation in steel wires in bridge cables. The Semi-Analytical Finite Element (SAFE) method serves as a powerful tool for analyzing wave characteristics in most, if not all, of waveguides. In this paper, the SAFE method for circular cross-section waveguide

was established in section 2. The frequency-spectrums, energy velocity and attenuation coefficient curves for viscoelastic steel wires can be obtained readily. Based on the method, the effects of initial tensile stress were studied in section 4. It demonstrates that tensile stress tends to increase energy velocities and decrease attenuations in regions above cut-off frequencies.

Keywords

Acoustic emission (AE), Semi-Analytical Finite Element (SAFE) method, wave modes, cables

References

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