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Xing, KeJia: Experiments and simulation in structural health monitoring systems using the E/M impedance and cross transfer function methods. 2015
Inhalt
Table of Contents
Nomenclature
Abstract
1 Introduction
1.1 Motivation & the Concept of Structural Health Monitoring
1.2 Classification of Structural Health Monitoring
1.3 Objectives and Outline of the Work
2 Fundamentals
2.1 Piezoelectric Elements
2.2 E/M Impedance Method (EMI Method)
2.2.1 Mathematical modelling of EMI
2.2.2 EMI method in experiments
2.2.3 Damage metrics and feature extraction
2.3 Wave Propagation
2.4 Spectral Element Method (SEM)
2.5 Phased Arrays
3 Cross Transfer Function Method for the Phased Array
3.1 The Theory of the Cross Transfer Function Method
3.2 Nonuniform Phased Array with Dolph-Chebyshev Distribution
3.3 Applications of the Cross Transfer Function Method
3.3.1 Beamforming simulation with SEM
3.3.2 Experiment: - the cross transfer function method in a uniform phased array
3.3.3 Experiment - cross transfer function method in nonuniform phased array with Dolph-Chebyshev Distribution
3.3.4 Experiment: the cross transfer function method in a uniform T-array
4 Self-diagnosis of Piezoelectric Elements
4.1 Fundamentals of Self-diagnosis by EMI
4.2 Self-diagnosis Application in the Experiments
4.2.1 Feature definitions in the spectra of EMI admittances
4.2.2 Self-diagnosis in two damage cases
5 Investigation of the Sensing Ability of Bonded Piezoelectric Elements
5.1 Numerical Investigation– SEM Combined with EMI Method
5.2 Experimental Investigation
5.2.1 EMI spectra comparisons between simulation and experiment
5.2.2 Experiments--- frequency and angle dependent
5.2.3 Results of the experiment on the larger square aluminium plate
6 EMI Method Applied in Monitoring Fatigue Crack
6.1 Experimental Set-up
6.2 Experimental Results
7 Conclusions and Discussion
References