numerical simulation of ultrasonic detection for concrete structure based on equivalent offset migration

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ID: 139783
2017
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Abstract
Ultrasonic wave testing is a classic Non-destructive testing (NDT) method to detect, locate and monitor the crack/fracture in construction materials. However, it is still hard to examine those small abnormal bodies since effective reflected signal from abnormity is usually rather weak. In this paper, a new ultrasound imaging technique, equivalent offset migration (EOM), is studied to demonstrate the feasibility and applicability for detecting concrete cracks. Thus, a complex numerical model along with six small scale flaws was built, and then the ultrasonic wave propagation in concrete was modeled by high order finite difference approximation method. Numerical simulation indicates that 1) there exists a strong scattering phenomenon while ultrasound propagates in concrete with multiple small scatter flaws, and 2) EOM is capable of imaging small flaws in concrete with high resolution and accuracy.
Reference Key
hu2017civilnumerical Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors ;Mingshun Hu;Juanjuan Li;Dongming Pan;Shenen Chen
Journal Journal of dentistry
Year 2017
DOI
10.14311/CEJ.2017.04.0040
URL
http://www.civilengineeringjournal.cz/archive/issues/2017/2017_4/4-2017-0040.pdf
Keywords
ultrasonic wave non-destructive testing (ndt) civil engineering (general) common scatter point (csp) gather

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