Use of nondegeneracy in norminally axisymmetric structures for fault detection with application to cylindrical geometries.

Journal Article · Wed Mar 01 00:00:00 EST 2000 · J. Sound Vib.

DOI:https://doi.org/10.1006/jsvi.1999.2653· OSTI ID:942512

Royston, T J; Spohnholtz, T; Ellingson, W A

A novel technique is proposed for the detection of localized flaws in otherwise axisymmetric structures. The technique is based on the split-mode phenomena that occurs when the degenerate vibratory modes of the axisymmetric structure become non-degenerate due to the flaw with altered mode shapes and shifted natural frequencies. A basic theoretical motivation is offered and computational and experimental studies on cylindrical structures are reported that verify the premises of the proposed methodology and provide an assessment of its specificity and sensitivity under confounding conditions, such as out-of-roundness.

• Research Organization: Argonne National Lab. (ANL), Argonne, IL (United States)
• Sponsoring Organization: EE
• DOE Contract Number: DE-AC02-06CH11357
• OSTI ID: 942512
• Report Number(s): ANL/ET/JA-32191; JSVIAG; TRN: US200916%%512
• Journal Information: J. Sound Vib., Vol. 230, Issue 4 ; Mar. 2000; ISSN 0022-460X
• Country of Publication: United States
• Language: ENGLISH

Related Subjects

42 ENGINEERING
DEFECTS
DETECTION
MEASURING METHODS
MECHANICAL VIBRATIONS
CYLINDRICAL CONFIGURATION
SENSITIVITY