Guided wave based damage detection method for aircraft composite structures under varying temperatures

被引：0

作者：

Gao D. ^{[1
]}

Ma Y. ^{[2
]}

Wu Z. ^{[3
]}

Zheng Y. ^{[3
]}

Lu H. ^{[1
]}

机构：

[1] Sun Yat-Sen University, Guangzhou

[2] China Academy of Launch Vehicle Technology, Beijing

[3] Dalian University of Technology, Dalian

来源：

SDHM Structural Durability and Health Monitoring | 2021年 / 15卷 / 01期

基金：

中国国家自然科学基金;

关键词：

Damage index; Guided wave; Spearman rank correlation coefficient; Structure health monitoring; Temperature effect;

D O I：

10.32604/sdhm.2021.013737

中图分类号：

学科分类号：

摘要：

Guided waves based damage detection methods using base signals offer the advantages of simplicity of signal generation and reception, sensitivity to damage, and large area coverage; however, applications of the technology are limited by the sensitivity to environmental temperature variations. In this paper, a Spearman Damage Index-based damage diagnosis method for structural health condition monitoring under varying temperatures is presented. First, a PZT sensor-based Guided wave propagation model is proposed and employed to analyze the temperature effect. The result of the analysis shows the wave speed of the Guided wave signal has higher temperature sensitivity than the signal fluctuation features. Then, a Spearman rank correlation coefficient-based damage index is presented to identify damage of the structure under varying temperatures. Finally, a damage detection test on a composite plate is conducted to verify the effectiveness of the Spearman Damage Index-based damage diagnosis method. Experimental results show that the proposed damage diagnosis method is capable of detecting the existence of the damage and identify its location under varying temperatures. © 2021 Tech Science Press. All rights reserved.

引用

页码：23 / 37

页数：14

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