Experimental Investigation of Nonlinear Free Vibration Characteristics in Breathing-Cracked Beams

DOI

10.2991/978-94-6463-932-2_27How to use a DOI?

Keywords

breathing-cracked beam; nonlinear vibration; spectrum analysis; information entropy; power spectrum entropy; auto-power spectrum entropy

Abstract

In free vibration experiments on simply supported reinforced concrete beams, acceleration response signals were measured. By integrating time-frequency analysis methods with information entropy theory, the auto-power spectrum entropy was constructed to analyze these signals. This approach revealed the nonlinear vibration characteristics of breathing-cracked beams in the frequency domain and effectively interpreted the trend of damage development. The auto-power spectrum entropy was used to evaluate the nonlinear vibration characteristics and crack propagation in breathing-cracked beam structures, quantifying the non-uniform energy distribution of acceleration signals across different load stages in the frequency domain. Experimental results demonstrated that auto-power spectrum entropy accurately captured the key nonlinear vibration features of breathing-cracked beams under free vibration at various load levels. Compared with traditional power spectrum entropy, this proposed method yielded more precise identification results. Notably, auto-power spectrum entropy possesses a clear physical interpretation, robust noise resistance, and high computational efficiency, making it a reliable tool for structural health monitoring of cracked beam systems.

Copyright

© 2025 The Author(s)

Open Access

Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

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TY  - CONF
AU  - Zhongkai Xie
AU  - Chengfa Deng
AU  - Wenliang Chen
PY  - 2025
DA  - 2025/12/22
TI  - Experimental Investigation of Nonlinear Free Vibration Characteristics in Breathing-Cracked Beams
BT  - Proceedings of the 2025 2nd International Conference on Civil Engineering Structures and Concrete Materials (CESCM 2025)
PB  - Atlantis Press
SP  - 262
EP  - 272
SN  - 2352-5401
UR  - https://doi.org/10.2991/978-94-6463-932-2_27
DO  - 10.2991/978-94-6463-932-2_27
ID  - Xie2025
ER  -