FIELD: metrology.
SUBSTANCE: invention relates to metrology, in particular to resonant tests of mechanical structures. Method for determining the parameters of the natural tones of structural vibrations consists in isolating one's own tones by the phase resonance method by using a multichannel system of excitation and measurement of oscillations, determining the frequencies of phase resonances, representation of the oscillations of the structure for each of its own tones by a linear oscillator, characteristics of which are the generalized excitation force of oscillations, generalized mass, generalized damping and generalized rigidity of the corresponding tone, the definition of generalized masses, generalized damping and generalized stiffnesses of tones by the vibrational response of the structure. By the relationship between the forced monophasic and intrinsic oscillations, the dissipative properties of the structures are revealed, the definition of the generalized parameters of each characteristic vibration tone is made by the amplitude-frequency characteristic of the construction in the vicinity of the phase resonance frequency corresponding to this tone from the condition that the generalized excitation forces of the structure and a linear oscillator that realize the same oscillation amplitude of the structure and oscillator.
EFFECT: increase the accuracy of determining the generalized masses and the damping characteristics of natural vibration tones.
1 cl, 3 dwg
