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Документ Анализ чувствительности конечномерных и континуальных моделей структурно связанных систем(НТУ "ХПИ", 2007) Назаренко, Сергей АлександровичCoupled-field analyses are useful for solving problems where the coupled interaction of phenomena from various disciplines of physical science is significant. There are basically two methods of coupling distinguished by the finite element formulation techniques used to develop the matrix equations. Complicated finite-element models sensitivity analysis methods for structurally connected systems are given in this article.Документ Виброизмерения рам тележек вагонов метрополитена в эксплуатационных условиях(НТУ "ХПИ", 2007) Жовдак, В. А.; Белоцерковский, Александр Борисович; Смирнов, М. М.; Ульянов, Юрий Николаевич; Яцько, С. И.; Черных, О. В.The article represents the vibration-survey technique of bogie frames of transit vehicles under service conditions. The oscillogram processing was carried out by discrete Fourier transform. For this purpose program Microsoft Excel was used. The spectrum of external loading is defined. This loading is caused by track irregularities. Also the natural vibration spectrum of bogie frames is obtained and confirmed by experimental data. The results of this article will be used for solving the statistical dynamics problem and reliability prediction of bogie frames. The delay of external loading on the weel pairs of bogie frames is taken into account.Документ Восстановление во времени функции нагрузки, воздействующей на бесконечную мембрану-полосу(НТУ "ХПИ", 2007) Янютин, Е. Г.; Кучерова, Н. И.Two methods to solve the inverse problem of determining the unknown time component of load are proposed in the article. It is supposed that the time dependence of deflection of the membrane-belt in one of its points is known. The integral Volterra equations of the first and the second kinds are used to solve the problem.Документ Длительная прочность клапана высокого давления с учетом неоднородного распределения температуры(НТУ "ХПИ", 2007) Львов, Геннадий Иванович; Лысенко, Сергей Викторович; Гораш, Е. Н.The unisothermal theory of long-term strength is considered on the basis of continuum damage mechanics. The model of Kachanov-Rabotnov-Hayhurst is extended to the case of variable temperature. Both the creep and the damage rates are complemented by temperature dependences of Arrenius. The resulting non-isothermal creep-damage constitutive model is incorporated into the FE-code of the universal CAE-system ABAQUS. The numeral calculation of long-term strength of three-dimensional model of corps of bypass valve of steam turbine is executed. The time rupture and the law of redistribution in the corps of valve of basic parameters of creep and damage are determined.Документ Исследование вибронагруженности элементов тележек электропоезда ЭПЛ-9Т(НТУ "ХПИ", 2007) Яцько, С. И.; Карпенко, В. В.; Ковалев, А. Е.The questions of definition the vibration load in conditions the ordinary of maintenance of elements of a running part of an electrotrain EPL-9T, manufacture company «Luganskteplovoz» are considered. The dependences of peak and average quadratic values vibration of acceleration, frame of the carriage, bearing assembly and of the electric motor from speed of driving of an electrotrain are obtained. The estimation of influence of electromagnetic perturbations of a drive on results of measurements is given. The obtained datas will be used in designer practice at projection new and operational development of serial elements of a running part of an electrotrain.Документ Исследование собственных колебаний системы тутбоагрегат-фундамент-основание при различных схемах потери контакта(НТУ "ХПИ", 2007) Красников, Сергей ВасильевичThe problems, related with break of contact of turbine case with foundation, are considered. The eigentones analysis of several versions turbine-foundation-base system with different version of break of contact are made. The mathematical models and calculations are executed on the basis of finite elements method.Документ Исследование технологических параметров сборки соединений с натягом, осуществляемых с термовоздействием(НТУ "ХПИ", 2007) Оборский, И. Л.; Звонарева, Антонина Петровна; Щепкин, Александр Витальевич; Дудинский, В. И.By means of the comparative data of the analytical and experimental researches, the value of increase of the fit diameter of electrocar built-up wheel bandage at its heating is determined.Документ К прощелкиванию пологих арок(НТУ "ХПИ", 2007) Кочуров, Р. Е.; Аврамов, К. В.; Бреславский, И. Д.The snap-through motions of shallow arch are simulated in this paper. Net method and direct numerical integrations are used to study snap-through motions.Документ Критические состояния консольных упругих труб под действием гироскопических и неконсервативных нагрузок(НТУ "ХПИ", 2007) Соловьев, И. Л.The problem of quasi-static and dynamic buckling of the elastic thin-wall console cylinder tubes rotating under axial non-conservative loading is considered. The dependence of their buckling character from the ratio between the parameter of angular velocity and value of non-conservative loading is investigated.Документ Методика моделирования трещин с контактирующими берегами на основе метода конечных элементов(НТУ "ХПИ", 2007) Зайцев, Б. Ф.; Шульженко, Н. Г.; Асаёнок, А. В.A technique for calculation of state of stress and strain of cracked bodies taking into account cracks sides contacts in normal direction is proposed. An example of calculation of strains of a cracked shaft under body weight at various shaft angle positions is presented.Документ Моделирование и численный анализ влияния оперативной коррекции на напряженное состояние большой берцовой кости(НТУ "ХПИ", 2007) Бреславский, Дмитрий Васильевич; Конкин, Валерий Николаевич; Сукиасов, Владимир Георгиевич; Пустовойт, Б. А.; Баха, В. Ф. ЯхьяThe comparative analysis results of various ways of operative correction of tibia face-to-face deformation are presented. Calculations are executed by finite element method in three-dimensional statement. Criterion for comparison is the stress state level of bone by physiological loading.Документ О снижении динамических нагрузок в валопроводе дизеля 6ТД-2(НТУ "ХПИ", 2007) Шатохин, Владимир Михайлович; Шаповалов, А. В.The results of design-experimental research about reasons revealing of dangerous dynamic modes beginnings in diesel drive shafting 6ТД-2 and reduction of their intensities at the expense of springy muff and joining to loads parameter variation are stated.Документ О стохастической модели статора турбогенератора(НТУ "ХПИ", 2007) Остерник, Э. С.The method for calculating the dynamics of the winding side of embedded stator is offered. This method is based on experiments over the materials of the winding bar and its model. Anisotropy of materials,in-plane shear, wave-like behavior of vibrations, and stochasticity of mechanical properties of materials are taken into consideration. Variational simulation takes into account the actual construction of bar fixing. It allows to evaluate the turbogenerator reliability in the process of operation.Документ Об исследовании критических скоростей ротора компрессора дизеля 6ТД-2 с нелинейной опорой(НТУ "ХПИ", 2007) Зайцев, Александр Иванович; Шатохин, Владимир МихайловичEstimation method of rotor critical velocities for diesel compressor 6TD subject to bearing nonlinear nature is developed. On the basis of this method lie approaches of initial parameters and harmonic linearization coupled with skeleton curves building idea. The results of design-experiment researches are cited.Документ Об экстремумах скорости падения сферического тела переменной массы(НТУ "ХПИ", 2007) Ольшанский, В. П.; Ольшанский, Станислав ВасильевичThe extreme properties of vertical fall speed of a spherical body with linearly changing in time radius are investigated. The conditions of motion speed monotonicity are determined.Документ Определение температурных напряжений платы с размещенными на ней электронными радиотехническими элементами(НТУ "ХПИ", 2007) Повгородний, В. О.In this article the temperature stresses for plate with radio-electronic elements are determined. For this purpose the problems of heat conduction and thermoelasticity are solved. Temperature stresses are found by ANSYS complex for rectangular plates. The results are required to make choice of cooling system. These plates with radio-electronic elements and water cooling system are used in the airborne equipment of native airplanes.Документ Определение технического уровня паровых турбин, основанное на критериях качества(НТУ "ХПИ", 2007) Капинос, Василий Максимович; Ищук, Ю. А.; Захарченко, Т. И.The diagnostics of the technical level of steam turbines by quality indexes with quantitative assessment is considered.Документ Оптимізація нагрівання при виплавлянні речовини з деталей циліндричної форми(НТУ "ХПІ", 2007) Андрєєв, Арнольд Георгійович; Маркін, О. М.; Щепкін, Олександр ВіталійовичThe heat optimization for artillery shell to smelt its content in technological process of unloading the out-of-date ammunition is the subject of this article. The heat is carried out by inductive-heating device. The computational investigation is made by the finite element method. The simplex method by J.A.Nelder and R.Mead is applied for optimization.Документ Оценка достоверности измерения внутренних напряжений методами магнитной структуроскопии(НТУ "ХПИ", 2007) Деньщиков, А. Ю.; Подлесный, С. В.; Шилюк, С. Н.; Шаповалов, К. П.The estimation of authenticity of results of measuring of internal stress by the method of measuring of coercitivity is conducted in the article. Research is conducted on different brands became. The estimation of size of error of determination of stress is executed, for the additional control, comparing of exactness of measuring is executed to the results, got tensiometer.Документ Построение математической модели полного электромагнитного подвеса ротора с использованием взаимосвязанных магнитомеханических уравнений Рауса(НТУ "ХПИ", 2007) Мартыненко, Геннадий ЮрьевичThe method of the mathematical model creation for the full electromagnetic rotor bracket with controlled radial and axial electromagnetic bearings is offered. The design procedure of magnetic resistance for magnetic subcircuits is given. Namely, the eight-polar stators and pins on the rotor are proposed for the radial bearing, and the stator in the form of a cup core and shorting disk are proposed for the axial bearing.