Experimentally validated structural vibration frequencies’ prediction from frictional temperature signatures using numerical simulation : a case of laced cantilever beam-like structures

摘要

This article pertains to the prediction of structural vibration frequencies from frictional temperature evolution throughnumerical simulation. To achieve this, a finite element analysis was carried on AISI 304 steel cantilever beam-like structurescoupled with a lacing wire using the commercial software ABAQUS/CAE. The coupled temperature–displacementtransient analysis simulated the frictional thermal generation. Furthermore, an experimental analysis was carried outwith infrared cameras capturing the interfacial thermal images while the beams were subjected to forced excitation, thusvalidating the finite element analysis results. The analysed vibration frequencies using a MATLAB fast Fourier transformalgorithm confirmed the validity of its prediction from the frictional temperature time domain waveform. This finding hasa great significance to the mechanical and aerospace engineering communities for the effective structural health monitoringof dynamic structures online using infrared thermography, thus reducing the downtime and maintenance cost, leadingto increased efficiency.