METHOD FOR DYNAMIC MONITORING OF HIGH MOBILE NON-LINEAR TECHNICAL SYSTEMS Russian patent published in 2021 - IPC G01N3/56 

FIELD: testing equipment.

SUBSTANCE: invention relates to testing equipment. The processes occurring on the frictional contact (FC) of the "object" and "model" are described by similar mathematical models, regression equations obtained in a field experiment, using mathematical planning of a complete or fractional factorial experiment. Measurement of HMNTS triboparameters is carried out during the tests. The friction coefficient is represented as a complex function, i.e. in the form of the ratio of the mutual tribospectrum in the tangential and normal directions to the autotribospectrum in the normal direction the real part of which characterizes the elastic properties of the frictional contact subsystem and the imaginary part of which characterizes the dissipative properties of the frictional contact subsystem. The control and recording of the specific area of ​​contact in real time is carried out by the method of conduction in a metal-metal pair or by the method of laser transmission in a metal-polymer pair. Equality of similarity constants is ensured in quasi-linear (mechanical) and essentially non-linear (frictional) subsystems of highly mobile non-linear mechanical systems (HMNTS) including pressure similarity constants amplitudes of fluctuations of deformations of conservative bonds С_ΔА=1 and rigidity of conservative bonds. The masses performing plane-oscillatory motions in the field of gravitational forces in the full-scale HMNTS are reduced to a rotating center of reduction of the physical and mathematical model of the HMNTS. Simplification of the equivalent dynamic model of HMNTS is carried out while observing the equality of the total kinematic and potential energies of the full-scale HMNTS and its physical and mathematical model, using Rayleigh’s method, which takes into account the values of the stiffness of the bonds connecting the concentrated and distributed masses.

EFFECT: ensuring a sufficient and necessary correspondence of the main dynamic characteristics of quasi-linear (mechanical) subsystems of the full-scale HMNTS and its physical model.

1 cl, 11 dwg, 1 tbl