Paper Info
Title
PZT-Based Ultrasonic Guided Wave Frequency Dispersion Characteristics of Tubular Structures for Different Interfacial Boundaries.
Abstract
For tubular structures, ultrasonic guided waves (UGWs) which are closely related to interfacial boundary conditions such as gas, liquid and solid materials, are usually used in damage detection. Due to the different phase materials inside tubes, the interfacial boundary (connection) conditions are variable, which has a great influence on the dispersion-related UGW propagation characteristics. However, most UGW-based damage detection methods only consider the pipeline structures as hollow tubes, ignoring the interfacial boundary condition influences on the UGW propagation. Based on the UGW theory, this paper aims to propose a novel method for describing the UGW propagation characteristics for different interfaces, and lay a foundation for the UGW-based tubular structure damage detection. Based on the Navier's equation of motion and combined with interfacial boundary conditions and coordinate conditions, the dispersion equations for a hollow steel tube, a tube filled with liquid, and a concrete filled steel tube (CFST) were established, respectively. Under the given conditions of both materials and geometric parameters, the transcendental dispersion equations were established and solved by using a numerical method. The UGW propagation characteristics in different interfaces were classified and discussed, and the dispersion curves of both group and phase velocities are drawn. To validate the efficiency of theoretical and numerical results, three kinds of model tubular structure experiments filled in air (hollow), water and concrete, respectively, were performed based on lead zirconate titanate (PZT) transducer UGWs. The results showed that the UGWs propagation in different interfaces has the dispersion and multi-modes characters, which are not only related to the product of frequency and thickness, but also to the internal dielectric material parameters and interfacial boundary conditions.
Year
DOI
Venue
2018
10.3390/s18124111
SENSORS
Keywords
Field
DocType
tubular structures,longitudinal ultrasonic guided waves (UGWs),dispersion characteristics,interfacial boundary conditions,product of frequency and thickness,interfacial debonding damage,PZT-based transducers
Frequency dispersion,Ultrasonic sensor,Electronic engineering,Acoustics,Engineering,Guided wave testing
Journal
Volume
Issue
ISSN
18
12.0
1424-8220
Citations 
PageRank 
References 
1
0.35
2
Authors
4
Name
Order
Citations
PageRank
Shi Yan112719.94
Bowen Zhang2479.61
Gangbing Song326750.36
Jiaoyun Lin410.35