Ultrasonic Guided Wave Plate-Like Structural Health Monitoring Under Varying Temperature
Journal Title: 河南科技大学学报（自然科学版） - Year 2019, Vol 40, Issue 2
Abstract
The ultrasonic guided wave structure health monitoring technique was easy to be affected by temperature interference in the defect diagnosis of plate structure, which affected the accuracy of array damage imaging. In order to overcome the effect of temperature change on damage detection, based on optimal baseline selection ( OBS) and baseline signal stretch ( BSS) , the improved method was proposed. The reference signal was screened by OBS, then the time shift was added to each wave packet, and the temperature compensation was completed by BSS. The improved method widened the temperature acquisition range from 1 ℃ to 10 ℃, and compensated each wave packet on the signal by time shift. Combined with the ellipse algorithm method, the relative error of imaging was less than 9% at the varying temperature. The experimental results show that the improved method is effective and accurately identifies the structural damage under ambient temperature change.
Authors and Affiliations
Jianzu GU, Rong CHEN, Gorgin RAHIM
Keywords
Related Articles
- EP ID EP422477
- DOI 10.15926/j.cnki.issn1672-6871.2019.02.011
- Views 88
- Downloads 0
Effect of Grephene on Separation and Transport Mechanism of Photogenerated Charges
Based on various mass fractions( 0. 4%,0. 8%,1. 2%,1. 6%,2. 0% and 2. 4%) of reduced graphene oxide( RGO),the composite system of Cu4Bi4S9( CBS) and RGO( CBS-RGO) were synthesized.Then two types of heterojunction Zn2SnO4...
Stress Relaxation Behavior of Al_2O_3/ Cu Dispersion Strengthened Copper Alloy
The stress relaxation behavior of Al_2O_3/Cu dispersion strengthened copper alloy at different temperature( room temperature,100 ℃,200 ℃ and 300 ℃) was studied by the stress relaxation experiment.The test data were fitte...
Preparation and Conductivity of Polymer Decorated Graphene Film
1
Test on Creep Characteristics of Remolded Loess Under High Stress
The high loess-filled embankment in Yan'an area was taken as research object. The high pressure consolidation creep tests were carried out under the control of moisture content and compaction degree. Theeffects of initia...
Construction and Photoelectric Conversion Properties of WO3/BiVO4 Composite Film Photoelectrode
WO3 and BiVO4 semiconductor films eletrodes were prepared by polymer-assisted deposition method and metal-organic decomposition method, respectively. The band structures of WO3 and BiVO4 semiconductor films eletrode were...