Hohai University

Jiangxi University of Science and Technology

Jsti Group

Emil Manoach

Maosen Cao

Tongfa Deng

Yufeng Zhang

Zeyu Wang

Dragoslav Sumarac

Dayang Li

Ganggang Sha

A damage identification method for a cantilever beam based on a multifractal spectrum of a multi-scale reconstructed attractor includes: acquiring an original acceleration signal of the cantilever beam by a dynamic measurement system, performing stationary wavelet decomposition on a pretreated acceleration signal to obtain multi-scale sub-signals, selecting the multi-scale sub-signal that can represent main vibration characteristics of the cantilever beam for phase space reconstruction and normalization to obtain a normalized multi-scale reconstructed attractor, constructing the multifractal spectrum of the multi-scale reconstructed attractor, establishing a damage index based on a singularity index of the multifractal spectrum, and identifying and locating damage of the cantilever beam according to a relative numerical value of the damage index. The method can quantify structural damage characteristics in multi-scale phase space domain from the perspective of multifractal, and provide the simple, rapid and accurate damage identification method for cantilever beam.

Damage identification method for cantilever beam based on multifractal spectrum of multi-scale reconstructed attractor

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Nanjing, China

Emil Manoach