USE OF SELF-SYNCHRONIZATION EFFECT IN VIBRATION CARS

Abstract

The problems of self-synchronization of a dynamic system of a resonant type with two degrees of freedom are considered. The possibility of self-synchronization of two suited resonant vibrating machines connected by an elastic connection is considered as dynamic systems. A theory is given about the property of the natural frequencies of sectioned systems. An approximate periodic solution corresponding to the self-synchronization mode is constructed. The parameter ranges leading to a periodic re-gime are investigated. The possibility of block design of resonant vibrating machines for technological purposes has been established. Mathematical modeling of transient and stationary modes of a number of resonant vibrating machines in block design has been carried out. The results of mathematical modeling of the problem using numerical methods (Maple, Delphi) are presented. The use of the results of theoretical studies makes it possible to abandon the rigid kinematic synchronization of the rotors of vi-bration systems, which leads to a reduction in the energy intensity of the equipment. A methodology has been proposed and devices have been developed for experimental research of the main laws and characteristics of the technological process of vibratory compaction of concrete mixtures. The study shows that resonant single-mass vibrating machines, when combined into a single system, relatively easily enter the self-synchronization mode and this mode is stably maintained when a number of system parameters change within a relatively wide range. This makes it possible to widely use the principle of sectioning when creating resonant vibrating machines and, in some cases, create heavy resonant vibrating machines from standard modules. It has been established that this method makes it possible to obtain concrete products of higher density than with known methods. In this case, water absorption decreases by 15-25%, and strength characteristics increase by 25-31%.