Please use this identifier to cite or link to this item:
Title: Evaluation of welding damage in welded tubular steel structures using guided waves and a probability-based imaging approach
Authors: Lu, X
Lu, M
Zhou, LM 
Su, Z 
Cheng, L 
Ye, L
Meng, G
Issue Date: 2011
Publisher: Institute of Physics Publishing
Source: Smart materials and structures, 2011, v. 20, no. 1, 015018 How to cite?
Journal: Smart materials and structures 
Abstract: Welded tubular steel structures (WTSSs) are widely used in various engineering sectors, serving as major frameworks for many mechanical systems. There has been increasing awareness of introducing effective damage identification and up-to-the-minute health surveillance to WTSSs, so as to enhance structural reliability and integrity. In this study, propagation of guided waves (GWs) in a WTSS of rectangular cross-section, a true-scale model of a train bogie frame segment, was investigated using the finite element method (FEM) and experimental analysis with the purpose of evaluating welding damage in the WTSS. An active piezoelectric sensor network was designed and surface-bonded on the WTSS, to activate and collect GWs. Characteristics of GWs at different excitation frequencies were explored. A signal feature, termed 'time of maximal difference' (ToMD) in this study, was extracted from captured GW signals, based on which a concept, damage presence probability (DPP), was established. With ToMD and DPP, a probability-based damage imaging approach was developed. To enhance robustness of the approach to measurement noise and uncertainties, a two-level image fusion scheme was further proposed. As validation, the approach was employed to predict presence and location of slot-like damage in the welding zone of a WTSS. Identification results have demonstrated the effectiveness of the developed approach for identifying damage in WTSSs and its large potential for real-time health monitoring of WTSSs.
ISSN: 0964-1726
EISSN: 1361-665X
DOI: 10.1088/0964-1726/20/1/015018
Appears in Collections:Journal/Magazine Article

View full-text via PolyU eLinks SFX Query
Show full item record


Last Week
Last month
Citations as of Aug 10, 2018


Last Week
Last month
Citations as of Aug 10, 2018

Page view(s)

Last Week
Last month
Citations as of Aug 13, 2018

Google ScholarTM



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.