METHOD OF DETERMINATION OF MECHANICAL PARAMETERS AND PARAMETERS OF RESONANCE OSCILLATIONS Russian patent published in 2004 - IPC

FIELD: mechanical engineering; methods of determination of mechanical parameters and parameters of mechanical oscillating systems.

SUBSTANCE: first method consists in revealing resonance area of frequencies (fl.,fh); at increased frequency of exciting force of object "f" after passage of f1 rate of change of frequency v_f1 is measured and recorded; then, amplitude of oscillations of object A1(f) is recorded and frequency f_l.h. is determined as frequency of exciting force above which amplitude of oscillations is reduced; magnitude of amplitude A_l.h. is determined from A₁(f) and respective magnitude of rate of change of frequency v_f1 is determined at frequency f_l.h. In case of reduction of frequency of exciting force of object "f":, similar actions are performed at opposite accuracy. Upon obtaining magnitudes of amplitudes A_l.h. and A_h.l. at corresponding frequencies f_l.h. and f_h.l. and rate of change of frequency v_f1 and v_f2, magnitudes of parameters of oscillations at resonance are estimated: amplitude A_r, frequency f^r and Q-factor of mechanical oscillating system of object. Second method consists in determination of tolerable level of exciting force and rate of change of frequency at passage of resonance area; exciting force shall not exceed tolerable level, frequency "f" is increased at rate v_f1 not below tolerable level; upper magnitude of frequency f_h is set for exciting force and mode of operation of object is kept till stationary oscillations; frequency f is reduced at rate v_f2 not below tolerable level.

EFFECT: avoidance of any effect on operating mode of object; avoidance of stoppage and delays at resonance frequencies; enhanced efficiency and reliability.

2 DWG