BENDING VIBRATIONS OF FLEXIBLE METAL HOSES AND EVALUATION OF THEIR OPERABILITY

Abstract

The results of theoretical and experimental studies of vibrations of flexible metal hoses (GMR) are presented. The previously performed analysis of experimental hysteresis loops showed that the GMR is a dissipative system with nonlinear characteristics of resistance forces and a nonlinear restoring force. The energy dissipation coefficients were determined by static hysteresis loops. In parallel, the estimation of oscillation decrements by the dynamic gain coefficient was carried out on the basis of experimental amplitude-frequency characteristics (frequency response) of the sleeves. Developed: a method for calculating the decrements of vibrations and the frequency response of the sleeves; according to the known shape of vibrations and amplitude, the deformations of the sleeve elements are calculated and then, based on the known fatigue curves, the number of cycles before the destruction of the GMR is determined.