Gubskyi S. Improving approaches to determining serviceability metal bridge cranes

Object of research is a process of an operational influence on a metal construction of bridge cranes. The purpose is to improve the determination operational applicability methods of bridge crane metal constructions' by means of a combination of a limit state method calculation, a finite element method and a method of magnetic nondestructive control. Used research methods are visual and magnetic nondestructive control, limit state method calculation, finite element method, engineering mechanics, mathematical statistics. Theoretical and practical results are the integrated approach to determination of operational eligibility of bridge crane metal constructions is developed. It allows to find dangerous elements, estimate accumulation of fatigue damages in a metal crane constructions and feasibility to define their operational eligibility, based on results of the carried-out surveying. Scientific novelty: for the first time the method of complex determination of operational eligibility of a metal bridge crane constructions is developed; for the first time the calculation methods, allowing to consider influence of parameters of elements of a metal crane constructions on indications of magnetic-coercive control, in particular thickness of elements, a ball of grain, a chemical composition and metal temperature are offered; for quality control of crane wheel rolling surface heat treatment it is revealed empirical interdependence of coercive force and hardness. Introduction: JSC Podjyomservice, JSC F.VETA, JSC HZ PTU, JSC HEZ PTM, PAO PTKI UKRKRANENERGO (Kharkov), JSC TYuF NORD-DIEKS (Dnepropetrovsk). Sphere of using: during design, modernization, diagnostics of bridge cranes.