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Guided wave multi-frequency damage localization method in variable-thickness structures by one pair of sensors based on frequency-dependent velocity anisotropy.
Zhang, Zhiyuan; Li, Bing; Xue, Chaolong; Wang, Yanqi; Zhang, Yunfei.
Afiliación
  • Zhang Z; National Key Lab of Aerospace Power System and Plasma Technology, Xi'an Jiaotong University, Xi'an, China.
  • Li B; National Key Lab of Aerospace Power System and Plasma Technology, Xi'an Jiaotong University, Xi'an, China. Electronic address: bli@mail.xjtu.edu.cn.
  • Xue C; National Key Lab of Aerospace Power System and Plasma Technology, Xi'an Jiaotong University, Xi'an, China.
  • Wang Y; National Key Lab of Aerospace Power System and Plasma Technology, Xi'an Jiaotong University, Xi'an, China.
  • Zhang Y; Xi'an Modern Chemistry Research Institute, Xi'an, China.
Ultrasonics ; 145: 107468, 2024 Sep 12.
Article en En | MEDLINE | ID: mdl-39276633
ABSTRACT
Variable thickness structures are prevalent in aircraft, ships, and other machines, necessitating numerous sensors for health monitoring to reduce safety hazards. This paper presents a guided wave multi-frequency localization method based on frequency-dependent velocity anisotropy. This method achieves damage localization in variable-thickness structures with a pair of sensors and can effectively reduce the number of sensors used for monitoring. Variations in structural thickness cause a gradient in guided wave velocity that bends the propagation path. Different thickness variations with different directions cause wave velocity anisotropy. As a result, variations in thickness cause possible damage loci determined by echo time to deviate from an elliptical shape. Because the velocity anisotropy is frequency-dependent, damage loci at different frequencies are close but do not overlap and intersect only at the damage location. So, the multi-frequency method can increase the damage information acquired by a single pair of sensors, enabling damage localization. Experimental validation was conducted on a steel plate with linearly varying thicknesses. The feasibility of the multi-frequency localization method was verified by successfully locating the damage at three different locations using a pair of receiver-excitation sensors. In addition, the experiments demonstrated the capability of this multi-frequency method in improving the localization accuracy of sensor networks. The method has potential applications in monitoring systems lightweight, phased arrays, and imaging enhancement.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Ultrasonics Año: 2024 Tipo del documento: Article País de afiliación: China Pais de publicación: Países Bajos
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Ultrasonics Año: 2024 Tipo del documento: Article País de afiliación: China Pais de publicación: Países Bajos