A STUDY OF ANTI-NOISE PROPERTIES OF MODAL STRAIN ENERGY CHANGE RATIO METHODFOR THE DAMAGE IDENTIFICATION OF FUNCTIONALLY GRADED CLASSICAL BEAM

Abstract

Abstract: The anti-noise property of modal strain energy change ratio method is studied for the functionally graded classical beam. Based on the computing platform of the finite element method, commercial software ABAQUS, modal parameters are computed for the free vibration of functionally graded classical beam. Those modal parameters are directly added by Gauss noises with a certain level in order to simulate the measured modal parameters. Three methods are compared for the computation of noise levels. Numerical examples are given to analyze the noise effect on the damage identification results. Numerical results reveal that the damaged element can be successfully identified with 1%, 2% or 5% measurement noise. It means that the modal strain energy change ratio method has very good anti-noise property for identifying damage in the functionally graded classical beam.

Key words: functionally graded classical beam, modal strain energy change ratio, damage identification, anti-noise property

CLC Number:

TB332

HUANG Li-xin, YUE Shi-yan, HU Zhong-ming, YANG Zhen-zhen. A STUDY OF ANTI-NOISE PROPERTIES OF MODAL STRAIN ENERGY CHANGE RATIO METHODFOR THE DAMAGE IDENTIFICATION OF FUNCTIONALLY GRADED CLASSICAL BEAM[J]. Fiber Reinforced Plastics/Composites, 2016, 0(2): 35-39.

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