Вісник № 12 том 1
Постійне посилання колекціїhttps://repository.kpi.kharkov.ua/handle/KhPI-Press/2565
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Документ Дискретная модель диска с лопатками газотурбинного двигателя(НТУ "ХПИ", 2003) Григорьева, П. П.; Лымаренко, Ю. А.; Шамровский, А. Д.Blades and disks are the most loaded elements of gas-turbine engines. In view of the big complexity of a problem, research of their work demands application of the modern methods based on use of the computer. Thus discrete models, as in the best way adapted for such discrete device, as represent the computer, are very interesting. In the article the discrete model of a gas-turbine engine disk with blades is offered, allowing to take into account winding oscillations of blades together with movement of a disk. Use of symmetry of system allows to reduce a task about oscillations of system with the big number of degrees of freedom to a task with two and three degrees of freedom . All mode shapes of oscillations of the system are describedДокумент Анализ чувствительности при комбинированном статико-динамическом нагружении конструкций(НТУ "ХПИ", 2003) Симсон, Эдуард Альфредович; Назаренко, Сергей Александрович; Зюзин, А. Ю.; Любецкая, В. Б.Sensitivity analysis methods of high both geometric and physical informational content are suggested for complicated FEA models, especially with design variables vector of high dimension, to minimize numbers of straight calculation procedure activation. Computational stages to obtain gradients of constructional functional are investigated. Application domain for developed mathematical apparatus is discussedДокумент Увеличение срока службы режущего инструмента(НТУ "ХПИ", 2003) Гладкова, В. И.In the article the experiments results at to increasing the service period of the cut tool by drifting the plasma covers by CIB-method and influence the liquid boride method are presented. The drawn a conclusion about advisable using methods in industryДокумент Расчет скоростей скольжения гребней колес относительно рельсов(НТУ "ХПИ", 2003) Маслиев, Вячеслав ГеоргиевичIn clause the specified analytical dependences for calculation of vectors of speeds of sliding of flanges of wheels of a rolling stock on a lateral side of a rail are offered at movement on a railwayДокумент Исследование ползучести пологих оболочек на базе уточненной теориии вариационно-структурного метода(НТУ "ХПИ", 2003) Склепус, С. Н.A creep problem for shallow shells within the framework of the refined theory is considered. The variational formulating of problem is presented. The method of solving of initially-boundary creep problem is based on joint usage of the variational-structural method and the Runge-Kutta-Merson method. The solution structures, the numerical results for creep behavior and the lifetime predictions for spherical shallow shell with different boundary conditions are presentedДокумент Напряженно-деформированное состояние толстостенной цилиндрической оболочки под действием несимметричного давления(НТУ "ХПИ", 2003) Сало, В. А.The approach is suggested to definition of the stress-strained state of elastic cylinders of any thickness. The used method is based on Reissner's variational principle, R-functions theory, the common equations of the three-dimensional theory of an elasticity, I.N.Vekua's method and algorithm for two-sided estimation of exactitude of approached solutions of the mixed variational problems. Efficiency of the method is shown on exampleДокумент Эффективность решения краевых задач нелинейного изгиба гибких пологих оболочек методом теории R-функций(НТУ "ХПИ", 2003) Андриевская, Л. С.; Курпа, Лидия Васильевна; Морачковская, Ирина ОлеговнаThe effective method basing on theory of R-functions and variational structural method is developed for solving of non-linear boundary problems. Elastic-plastic bending of thin shallow shells is considered. The problems are reduced to finding of stationar points of suggested mixed variational functionals according to initial linearization by use of schemes of subsequent loading and Newton-Kantorovich jointly with method of varying elastic parameters. The method is used for automatic calculations in «POLE» programming system for calculations of shell structural elements. The numerical justification of the method is given. New laws of non-linear deformation of shallow shells and plates with complex shape in plane are establishedДокумент Лазерная диагностика потоков. Часть 1. Двумерные модуляторы лазерного излучения(НТУ "ХПИ", 2003) Товажнянский, Леонид Леонидович; Капинос, Василий Максимович; Никитина, Е. В.; Никитин, А. М.Plans of acoustic-optical coherent radiation modulators with fluid fissile devices and the mathematical description of bidimentional acoustic modulation processes are given. The main feature of the described modulator is to derive coherent rays individually oriented in space. Theoretical results for acoustic excitation angles from п/3 to п/2 are observationally confirmedДокумент Конечноэлементный расчет магнитных цепей активных магнитных подшипников на основе уравнений магнитостатики(НТУ "ХПИ", 2003) Смирнов, М. М.; Мартыненко, Геннадий Юрьевич; Бабенко, Игорь НиколаевичIn work the technique of account of magnetic circuits of active magnetic bearings by a method of final elements and processing of results is of fered with the purpose of definition of discrete parameters of magnetic circuit. The example of account of magnetic circuit with stator as octopole is givenДокумент Узагальнена математична модель структурно зв'язаних механічних систем(НТУ "ХПІ", 2003) Автономова, Людмила Володимирівна; Бондар, Сергій Володимирович; Лавінський, Володимир ІвановичНадана математична постановка мішаної контактної задачі для структурно зв'язаних механічних систем з урахуванням фізично-нелінійного та конструктивно нелінійного деформування елементів при контактному, тепловому й електромагнітному навантаженняхДокумент Влияние структуры наплавленного материала на прочность и долговечность деталей машин(НТУ "ХПИ", 2003) Березняков, А. И.; Градыский, Юрий Александрович; Стадниченко, Н. Г.The influence of precipitation surface's temperature and the speed of surfacing cooling in the process of material's electromagnetic buiding-up on the fatigue durability and tribomechanical characteristics of the restoration surface were examined. The equation connecting the production of entropy with the speed of material cooling was reached. It was established by the way of experiment that materials thermomagnetic machining leads to the improvement of its structure. It is discovered that details restoration by electromagnetic method leads to the improvement of the structure and tribomechanical properties of the surfaceДокумент Напряженно-деформированное состояние составной матрицы штампа при полугорячем выдавливании металлов(НТУ "ХПИ", 2003) Лавинский, Денис ВладимировичThe analysis of thermal loading on strength and stiffness of semi hot extrusion die was considered in this article. The finite element method which is realized as program package SPACE-T was chosen as tool of solution. The contact interference was solved with contact layer method helpДокумент Исследование нагруженности и усталостной прочности фланцевого окончания корпуса моста трактора Т-150К(НТУ "ХПИ", 2003) Никитенко, Ю. Д.Рассмотрены определения параметров нагрузок на ведущий мост, действующих при работе трактора Т-150К. Проведены многочисленные исследования прочности различных вариантов болтового фланцевого соединения и конструкции фланцевого окончания картера моста. Достигнуто повышение прочности корпуса моста ведущего и фланцевого болтового соединенияДокумент Численное исследование влияния технологических параметров изготовления на упругие свойства коротко-волокнистых композитных материалов(НТУ "ХПИ", 2003) Альтенбах, Х.; Науменко, К.; Львов, Геннадий Иванович; Пилипенко, С. Н.The paper presents a model which allows to estimate the elastic properties of thin-walled structures manufactured by means of injection molding. The starting point is the numerical prediction of the microstructure of the short fiber reinforced composite induced during the filling stage of the manufacturing process. For this purpose the commercial program Moldflow Plastic Insight® is used. The result of the filling simulation characterizing the fiber microstructure is the second rank orientation tensor. The elastic material properties after the processing are locally dependent on the orientational distribution of fibers. The constitutive model is formulated by means of the orientational averaging for the given orientation tensor. The tensor of elastic material properties is computed and translated into the format for the stress-strain analysis based on the ANSYS® finite element code. The influence of technological parameters of manufacture on microstructure and elastic properties is discussed on examples of a center-gated disk and shell of revolutionДокумент Определение допустимых амплитуд вибраций для лазерной бесплатформенной инерциальной навигационной системы(НТУ "ХПИ", 2003) Погорелов, Сергей Юрьевич; Счастливец, Кирилл ЮрьевичThe tolerate vibration amplitudes which acts on laser strapdown inertial system have been investigated in the proposed paper. For created three-dimensional model have been defined the acceleration limit value and natural oscillation frequencies, on the base of what the tolerate vibration amplitudes for determined frequency range have been obtainedДокумент Нестационарное деформирование многослойных упругих тел в форме прямоугольного параллелепипеда(НТУ "ХПИ", 2003) Янютин, Е. Г.; Светличная, С. Д.; Томилка, Н. Н.The unsteady déformation of multilayered elastic solids in the shape of rectangular parallelepiped is investigated using the dynamic theory of elasticity. Motion equations and systems of primary, boundary and contact conditions are satisfied exactly owing to this methodДокумент К вопросу об упрочнении материалов импульсным нагружением(НТУ "ХПИ", 2003) Вакуленко, К. В.; Сотрихин, С. Ю.; Чернобрывко, М. В.The problem of strengthening constructions elements, which were subject to influencing of the impulsive loading is examined. The mathematical model of process with variation of loading is built. Wave equalization is decided and the numeral experiment for rail steel is conductedДокумент Задача о контактном взаимодействии анизотропных тороидальных оболочек(НТУ "ХПИ", 2003) Верещака, Сергей МихайловичThe variant of account two of anisotropic of shells of rotation in the form of the tor is offered at action of internal pressure. The considered shells have a general axis and their appropriate surfaces are placed on certain distance one from another. The analysis of distribution of contact pressure will be carried out which arises on a local sites between shells at action of static loading. The account of a task is carried out on a basis of the vectorially nonlinear theory of shells in view of deformations of cross shiftДокумент Напряженное состояние в винтовой обмотке тороидальной магнитной системы электрофизической установки под действием температуры(НТУ "ХПИ", 2003) Зайцев, Б. Ф.; Асаёнок, А. В.State if stress of the toroidal magnetic system winding of a result of the warm-up is considered. The 3D FEM with special system of the representation of geometry is used. Analysis of results and comparison with other solution are presentedДокумент Некоторые прикладные модели прочностной надежности при внезапных отказах(НТУ "ХПИ", 2003) Гринченко, А. С.The mode of a schematization are real casual process loading is offered which thus will be transformed to a discrete sequence statistically of independent overloads. The definition of probability durability is considered at a multiplis operation of overloads. Some analytical models convenient at execution of practical accounts of elements machines and constructions on durability reliability are obtained