A Two-Stage Scheme for Plate Damage Identification Based on Lock-in Thermography and Dynamic Analysis

Abstract:

This paper presents a two-stage scheme of damage identification for plate-type structure. In the first stage, probable damaged regions and their relative severities can be detected based on lock-in thermography technique. In the second stage, the relation between the damage level and its corresponding natural frequencies of the plate is constructed by means of Kriging surrogate model based on dynamic analysis. The inverse problem of damage quantification over the surrogate model is then solved by using a robust stochastic particle swarm optimization algorithm. Experimental study on a double-damaged plate demonstrates the feasibility and effectiveness of the proposed scheme.

• Periodical: Key Engineering Materials (Volumes 569-570)
• Pages: 839-846
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.569-570.839
• Online since: July 2013
• Authors: Hai Yang Gao, Xing Lin Guo, Pei Jun Hou, Cheng Wei Wu, Hua Jiang Ouyang
• Keywords: Damage Identification, Kriging Surrogate Model, Lock-In Thermography, Plate Structure

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