| Abstract: | The paper presents the results of a numerical study of forced and decaying vibrations of a system simulating a body with a
closing crack under the action of various modes of a nonlinear restoring force and nonlinear viscous friction or the hysteresis-type
energy dissipation. We obtained the general patterns of appearance of higher harmonics of the Fourier expansion of time dependence
of vibration of a cracked body model. The sensitivity of the higher-harmonic method to the presence of a crack is compared
with that of some other vibration damage indicators.
Institute of Problems of Strength, National Academy of Sciences of Ukraine, Kiev, Ukraine. Translated from Problemy Prochnosti,
No. 6, pp. 65–80, November–December, 1999. |
