FIELD: construction.
SUBSTANCE: method for monitoring buildings and structures includes measuring by at least one object vibration parameter sensor in-phase measuring three orthogonal projections of the acceleration vector and consists in pre-setting a sensor to an element of the building structure of a building or structure by orienting its three orthogonal measurement axes In the direction of the main axes of symmetry of a building or structure, one of which is vertical, record the measured projections of the linear acceleration of micro-vibration under the influence of the microseismic background of natural and technogenic origin measuring sensor into orthogonal axes centered projection measured linear acceleration, separating the useful signal by subtracting the projections of the gravity vector g from the measured signal to three orthogonal sensor measuring axes, calculating the amplitude-frequency characteristics of the linear acceleration projections along the three orthogonal axes using the direct Fourier transform for the recorded measurement session, smoothing the spline model of the amplitude-frequency characteristics of the linear acceleration projections by three the orthogonal axes are determined visually by the points of inflection of the realizations of smoothing functions, amplitude characteristics of the linear acceleration projections along three orthogonal axes and the corresponding amplitudes and frequencies of the measured signal, the resulting estimates of the signal frequencies are ranked in order of decreasing amplitude. It is assumed that the frequency at which the largest amplitude corresponds is the pitch frequency of the natural oscillations of the building or structure, and the remaining frequencies are signal overtones whose numbering is carried out in descending order of the corresponding amplitudes, find the root-mean-square estimates of the detected frequencies from the points of intersection of a straight line parallel to the horizontal axis of counting the frequencies of the measured signal passing through a local maximum in amplitude corresponding to the frequency of the analyzed tone of its own oscillations of a building or structure, with a smoothing model representing a set of numerical estimates of the amplitudes increased by the magnitude of the root-mean-square error of their estimation, and then projecting these points onto the reference axis of the measured signal frequencies.
EFFECT: increasing the accuracy and efficiency of experimental determination of characteristics of natural oscillations of operated buildings and structures when investigating their strength in the monitoring process.
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