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Документ Получение высокобористой стали индукционной плавкой: структура и свойства(АА Тандем, 2020) Князев, Сергей АнатольевичДокумент Comparative analysis of electrical and thermal control of the lining state of induction apparatus of copper wire manufacture(НТУ "ХПИ", 2018) Zolotaryov, V. M.; Shcherba, M. A.; Belyanin, R. V.; Mygushchenko, R. P.; Kropachek, O. Yu.This article is intended to develop a technique for monitoring the lining state of induction channel furnaces for melting oxygen-free copper by monitoring changes in the distribution of thermal fields in their lining and carrying out a comparative analysis of the developed technique with the existing one that controls the electrical resistance of the melting channel of the furnaces. For carrying out the research, the theories of electromagnetic field, thermodynamics, mathematical physics, mathematical modeling based on the finite element method were used. A technique for diagnosing the lining state of the induction channel furnaces for melting oxygen-free copper has been developed, which makes it possible to determine the dislocation and the size of the liquid metal leaks by analyzing the temperature distribution over the body surface both the inductor and the furnace. The connection between the temperature field distribution on the surface of the furnace body and the dislocation and dimensions of the liquid metal leaks in its lining is determined for the first time. Using the proposed technique will allow to conduct more accurate diagnostics of the lining conditions of the induction channel furnaces, as well as to determine the location and size of the liquid metal leaks, creating the basis for predicting the working life of the furnace.Документ Analysis of electromagnetic processes in the system "cylindrical solenoid - massive conductor"(НТУ "ХПИ", 2018) Batygin, Yu. V.; Chaplygin, E. A.; Sabokar, O. S.; Strelnikova, V. A.Defining the key parameters of the inductor geometry, as a long multi-turn solenoid, that influence on the current amplitude induced excited in a massive conductor with a flat boundary surface. Performing a mathematical analysis of the electrodynamic problem solution for an area with variable structure by integrating Maxwell's equation within the given boundary and initial conditions and also physical assumptions simplifying the process of solving but not distorting the result and carrying out an experiment that confirms not only the correctly construction considered but also the acceptability of the chosen assumption the opacity applying of the metal blank for these operating fields frequencies. Functional dependencies of the current induced parameters on the metal surface of the heating object have been obtained, along which numerical estimates of the electrodynamic process have been performed, and key parameters influencing the heating efficiency have been determined. The correctness of the solutions obtained was confirmed experimentally. The final form of the solution function of the physical-mathematical problem was shown to be acceptable for performing further engineering and research calculations. The functional connection of the measured values of the induced surface current and the parameters of the measuring system is determined, the experimental confirmation of which indicates the satisfactory calculation model of the induction heating system and the entire solution as a whole. Based on the calculations performed, working samples of inductive systems for induction heating that meet the specified heating rate and area requirements can be constructed. The obtained analytical expressions were transformed and simplified for their further using for engineering calculations with a minimum error value.Документ Finite element technique for solution of thermo-contact problems and its application in numerical analysis of devices working with induction heating(НТУ "ХПИ", 2016) Pantelyat, M. G.; Doležel, I.A finite element technique for solution of 2D multiphysics (electromagnetic, thermal and structural) problems is developed, taking into account temperature dependences of material properties and continuous variations of the contact surfaces. Modeling of the contact interaction between two parts is based on the concept of a special contact finite element having no thickness. The functional for the temperature problem is supplemented with components corresponding to the thermal conductivity of this contact layer. The heat generated due to mutual sliding of both parts can also be taken into account, but the heat capacity (specific heat) of the contact layer is neglected. Using a special ID 4-node finite elements a system of equations for the description of the thermo-contact problem is obtained.Документ Построение процедуры интеллектуального управления процессом нагрева заготовок в индукционной печи(НТУ "ХПИ", 2012) Голоскоков, Александр Евгеньевич; Гаврусь, Е. С.В данной статье рассмотрена задача синтеза процедуры интеллектуального управления процессом нагрева заготовок в индукционной печи. Описаны основные проблемы, связанные с данной процедурой, показана актуальность данных проблем и сформулирована постановка задачи исследования процедуры интеллектуального управления процессом нагрева заготовок в индукционной печи. Описаны методы решения данной задачи и дальнейшие пути исследований.