METHOD OF ANALYZING PARAMETERS OF STRESS-STRAIN STATE OF ELASTIC OBJECTS

摘要

FIELD: measurement technology.;SUBSTANCE: invention relates to investigation of elastic properties of construction or structures, namely objects of transport infrastructure and vehicles themselves, by means of creation of their physical and finite-element (FE) models. During the method implementation geometrically similar scale physical and finite-element models of elastic objects are created, performing their harmonic loading by different types of loads determined in accordance with scaling criteria of similarity, measuring frequencies and amplitudes of resonant oscillations of various parameters of stress-strain state of created models. Additionally performing thermal loading of geometrically similar scaled physical and FE models of elastic objects, frequencies and amplitudes of resonant oscillations of various parameters of stress-strain state of physical and FE models are measured and calculated in the whole range of their natural frequencies with due allowance for inverse proportionality of change of frequency values at change of scale of physical and FE models which are modified to achieve compliance of measured and calculated values of frequencies and amplitudes of resonance oscillations of these parameters are real to their values for natural objects.;EFFECT: high accuracy of analyzing parameters of stress-strain state of natural objects in order to achieve correspondence of frequencies of resonance oscillations for physical, FE models and actual objects in the whole range of their natural frequencies with allowance for reverse proportionality of frequency variation depending on scale of physical and FE models, and their thermal loading.;1 cl, 5 dwg