On-Line High-Speed Rail Defect Detection [Final Report]

Lanza di Scalea, F.; Bartoli, I.; Rizzo, P.; McNamara, J.; University of California, San Diego

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On-Line High-Speed Rail Defect Detection [Final Report]

2004-10-01
By Lanza di Scalea, F. ; Bartoli, I. ; Rizzo, P. ; ...

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English

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Creators:

Lanza di Scalea, F. ; Bartoli, I. ; Rizzo, P. ; McNamara, J.

Lanza di Scalea, F. ; Bartoli, I. ; Rizzo, P. ; McNamara, J. Less -
Corporate Creators:

University of California, San Diego
Corporate Contributors:

United States. Federal Railroad Administration. Office of Research and Development
Subject/TRT Terms:

[+]

Flaw Detection High Speed Ground Transportation High Speed Rail High Speed Track Inspection Railroad Rails--Defects--United States Railroad Rails--Inspection--United States Railroad Safety Ultrasonic Testing--United States
Publication/ Report Number:

DOT/FRA/ORD-04/16 ; UCSD SSRP-2004/10

DOT/FRA/ORD-04/16 ; UCSD SSRP-2004/10 Less -
Resource Type:

Tech Report
Geographical Coverage:

United States
Edition:

Final report--part 1; Aug. 2003-Aug. 2004.
Corporate Publisher:

United States. Federal Railroad Administration. Office of Research and Development
Abstract:

This report presents the results of phase 2 of the project “On-line high-speed rail defect detection” aimed at improving the reliability and the speed of current defect detection in rails. Ultrasonic guided waves, traveling in the rail running direction, were examined for this task. The advantages of this approach include: the inherent sensitivity to transverse-type cracks even in the presence of surface shells , the potential for extremely high testing speed, and the ease of field deployment since the sensors can be positioned at distances as far as 3.5 inches from the rail surface. Two methods of implementation were investigated. The first method used an impact hammer for wave generation and air-coupled sensors for wave detection. This setup proved effective for detecting “large” (>15% H.A.) transverse cracks at frequencies below 50 kHz. The second method used a pulsed laser for wave generation. This setup proved effective for detecting “small” (<15% H.A.) transverse surface-breaking cracks as shallow as 1 mm at frequencies between 100 kHz and 600 kHz. The inspection ranges (distance covered in one test) were substantially larger than current methods.
Format:

PDF
Funding:

DTFR53-02-G-00011
Collection(s):

US Transportation Collection
Main Document Checksum:

[+]

urn:sha256:bf4905d30657ba0d39603c8fd450526f799d566fa4ddd0ef692616a51e2b4e7b
Download URL:

https://rosap.ntl.bts.gov/view/dot/23193/dot_23193_DS1.pdf
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On-Line High-Speed Rail Defect Detection [Final Report]

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