резонанс

Aim. The purpose is to form a generalized performance indicator and analysis of resonant vibration machines, taking into account their main energy, dynamic and technological characteristics. Method. Three basic parameters the ratio of the maximum acceleration of the working mass to the power consumption, the coefficient of asymmetry of acceleration and the width of the resonance zone were used to evaluate the efficiency of vibration systems. These indicators are reduced to a dimensionless form in the next step.

The article deduces an analytical dependence that establishes for a long vibration vehicle a rational length of a working body, as a body with a distributed mass, since it is impossible to match its own frequency of oscillations with the forced.

The article substantiates the possibility of further improvement of highly effective interreonance oscillatory systems. To do this, it is proposed to apply a discrete-continuum oscillation system in which a third ultra-light mass is used as a body with distributed parameters (ultra-light weight).

The purpose of the paper. Substantiation of structure (design), parameters and operation modes of the improved vibratory finishing machine. Analysis of dynamical processes which occur during “lap over lap” dressing. Investigation methodology. Mathematical model of motion of the mechanical system of vibratory finishing machine was developed on the basis of Lagrange differential equations of the second order. For the purpose of describing friction between the working surfaces of the laps, the Coulomb friction model was used.

Worked out calculation chart on the basis of equalizations of Lagrange the second family the system of linear differentialequalizations in a matrix form, that describe a shakeprocess in circular electromagnetic cavitator of resonantaction, is got, and it is got solution of matrix equalization in a complex form.

The optimization model based on the criteria of energy efficiency of vibration systems is considered. This criterion is presented as the ratio of maximum of the working mass acceleration to consumption power of system. Optimization task is added of constraints that determine the technological aspects of vibrational resonant type - the width of the resonance zone, coefficient asymmetry of acceleration, maximum acceleration of the working mass. Searching of stiffness of asymmetric piecewise linear elastic properties at the basic of synthesis is entrusted.

In the article is an example of a vibrating hopper feeder full methodology described his design with the withdrawal of the main analytical dependencies that set the parameters of the system

The method of vibration of cavitation treatment of substances of liquids and device is described for determination of frequencies of resonances of own vibrations of present in the processed liquids embryos of cavitation. It is proved that optimum are the modes which frequencies of vibrations of cavitation are multiple frequencies of own vibrations of embryos of cavitation at.

In the article the considered change of basic tribological descriptions of superficial layer of workings surfaces of pair of friction is at their voice oscillation treatment in a resilient environment. The technological parameters of process of treatment and of principle chart of setting are analysed. The results of conducted experimental treatment of details are rotined.