FEASIBILITY OF FLAW DETECTION IN RAILROAD WHEELS USING ACOUSTIC SIGNATURES
The feasibility study on the use of acoustic signatures for detection of flaws in railway wheels was conducted with the ultimate objective of development of an intrack device for moving cars. Determinations of the natural modes of vibrating wheels under various conditions are reported. Differences in acoustic signatures are found between good and cracked wheels, including spectral changes and variations in the time decay of sound. Various sounds occurring in normal railroad practice, such as rolling noise on welded rail and over joints and retarder screech were investigated. It was concluded that special purpose impacters will have to be used for a servicable device. Pattern recognition techniques were used for selecting good and bad wheels with a computerized processing scheme. A laboratory demonstration system has been constructed and found to be 85% reliable when system malfunctions are discounted.
- Record URL:
- Prepared by Houston University, Texas, Department of Mechanical Engineering.
Transportation Systems Center55 Broadway, Kendall Square
Cambridge, MA United States 02142
University of HoustonDepartment of Mechanical Engineering
Houston, TX United States 77004
Washington, DC United States 20590
- Nagy, K
- Finch, R D
- Publication Date: 1976-10
- Features: Appendices; Figures; References; Tables;
- Pagination: 206 p.
- TRT Terms: Acoustic signature; Computer printouts; Cracking; Defects; Detectors; Flaw detection; Inspection; Nondestructive tests; Pattern recognition systems; Railroad cars; Sonic tests; Ultrasonic detectors; Ultrasonic tests; Wheels
- Old TRIS Terms: Sonic testing; Wheel flaws; Wheel inspection
- Subject Areas: Railroads; Vehicles and Equipment;
- Accession Number: 00151221
- Record Type: Publication
- Source Agency: National Technical Information Service
- Report/Paper Numbers: DOT-TSC-FRA-76-6 Final Rpt., FRA/ORD-76/290
- Contract Numbers: DOT-FRA-76-6
- Files: NTIS, TRIS, USDOT
- Created Date: Apr 13 1977 12:00AM