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 influence of the elastic non-linearity of typical cracks, superharmonic vibration regimes appear in the system response. By utilizing specific 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.
Non-linear vibration method for detection of fatigue cracks in aircraft wings
Eine nichtlineare Schwingungsmethode zur Detektion von Ermüdungsrissen in Flugzeugflügeln
Journal of Sound and Vibration ; 236 , 1 ; 49-60
2000
12 Seiten, 7 Bilder, 21 Quellen
Article (Journal)
English
Non-linear vibration method for detection of fatigue cracks in aircraft wings
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