NON-LINEAR VIBRATION METHOD FOR DETECTION OF FATIGUE CRACKS IN AIRCRAFT WINGS

✍ Scribed by S.L. TSYFANSKY; V.I. BERESNEVICH

• Publisher: Elsevier Science
• Year: 2000
• Tongue: English
• Weight: 162 KB
• Volume: 236
• Category: Article
• ISSN: 0022-460X
• DOI: 10.1006/jsvi.2000.2981

✦ Synopsis

Some results of mathematical simulations of bending vibrations encountered in a cracked aircraft wing under external harmonic excitation are presented. It is shown that due to the in#uence of the elastic non-linearity of typical cracks, superharmonic vibration regimes appear in the system response. By utilizing speci"c features of these regimes a new vibration method for the detection of cracks is developed, and an original procedure for transformation of the non-linear elastic properties of the damaged cross-section is proposed. Unlike traditional procedures the vibration method proposed herein shows capability of high detection sensitivity and testing reliability.

2000 Academic Press