Kostenko I. The analysis of dynamical processes parameters in vibroimpact machines with variable mass and stiffness characteristics

The object of study - the dynamic processes in vibroimpact machines. The purpose of research - development of dynamics calculation methods for vibroimpact machines by the tuning out criteria from resonant modes. These criteria are based on the detection of dependencies between natural frequencies and the circuit design, design parameters. The methods of study: methods of oscillation theory, the theory of elasticity, theory of three-dimensional solid and surface modeling, finite element method, accelerometer method. Theoretical and practical results: the dynamic characteristics of vibro-impact systems with the influence of the progressive characteristics of elastic supports and a variable weight were defined. The description of the movement and distribution of impact interaction forces in vibro-impact machines were defined. The design criteria for bodies of vibro-impact machines was proposed. The software and model complex that allow to study dynamical characteristics, stress and strain state, with influence of variable mass and stiffness of supports and detect periodical modes of operation. The novelty: the approach to the account of influence of variable weight and stiffness of elastic supports in vibroimpact systems was proposed; the methods for search of periodical mods and tuning out of natural modes spectrum from multiple (partite) frequences was created; the prospective design criteria for vibroimpact machines were offered. The degree of embedding: results of the thesis are introduced at PJSC "Azovmash" (Mariupol), PJSC "Chief specialist Design and Technology Institute" (Mariupol), PJSC "Elektrostal" (Mariupol) and PJSC "Karlovski Engineering plant" (Karlivka , Poltava region.), National technical University "Kharkiv Polytechnic Institute" (Kharkiv). Scope of application: foundry manufacturing, the production and processing of building materials, the processing of agricultural production.