IDENTIFICATION OF ELEMENTS OF MECHANICAL SYSTEMS OF MACHINE UNITS BY A PRIORITY TYPE OF TRANSFORMABLE ENERGY

Abstract

To determine the actual loads in the practice of conducting dynamic calculations of the mechanical systems of machine units, the actual schemes of machines are in the form of chains of reduced masses (moments of inertia), reduced stiffnesses (compliance) and reduced friction moments. In addition, each element of such a dynamic chain to a certain extent has inertial, elastic and dissipative properties, accumulating kinetic or potential energy, as well as dissipating part of the transmitted energy.

As a criterion by which an element can be attributed to inertial, elastic or dissipative, one should take the ratio of the amount of accumulated and scattered energy. If an element of power transmission when operating in a given mode accumulates a magnitude of kinetic energy greater than the magnitude of its potential energy, then this element can be classified as inertial. Otherwise – the category of elastic. The power transmission element can be referred to the category of dissipative links by the ratio of dissipated energy and energy transmitted from the engine to the executive body.
On the basis of this, criterion expressions for determining the category of dynamic links in the compilation of a discrete chain dynamic model, which allow more correctly to build dynamic models of mechanical systems of machine units, are obtained.