Вісник № 31

Постійне посилання колекціїhttps://repository.kpi.kharkov.ua/handle/KhPI-Press/2850

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К вопросу оптимизации технологических параметров центробежно-ударных дробилок
(НТУ "ХПИ", 2004) Алтухов, В. Н.
The article is devoted to the research of the working process of rotary crushers, choice of the optimum structure and parameters providing lowering of dynamic loads and rise of the technological level of crushing engines. In operation the new solution of the actual scientific task encompassing by develop¬ment of the theory of working process of rotary crushers allows to install the rational structure and pa¬rameters of the crusher at the stage of designing, to forecast the power characteristics of the process of subdivision, productivity and grain composition of the product for the concrete operation conditions.
Експериментально-аналітичне визначення параметрів зношування та витривалості авіаційних матеріалів
(НТУ "ХПІ", 2004) Приймаков, Олександр Григорович; Приймаков, Григорій Олександрович; Градиський, Юрій Олександрович; Бобровицький, О. В.
Intensity of wear (I) and coefficient of friction (μ) of most typical aviation construction high-alloyed and heat-resistant steels 40ХНМА, Х17Н2, 30ХГСНА (DSTU 4543 - 94) are experimentally defined. It is shown, that intensity of wear can be integral index of endurance of aviation construction steels, that allows to determine simultaneously parameters of wearproof and endurance.
Полуэмперическое уравнение для определения степени реактивности турбинной ступени
(НТУ "ХПИ", 2004) Капинос, Василий Максимович; Навроцкий, В. В.; Смородская, Инна Васильевна; Марченко, Н. Д.
An approximate equation for the definition of a stage reaction degree is presented. The equation can be used for heat calculation of a blading by parameters after a last stage.
Нестационарное распределение давления в магистральном газопроводе подземной прокладки с учетом тепловых и нелинейных эффектов
(НТУ "ХПИ", 2004) Якунин, А. В.; Ратаушкин, В. А.
Рассматриваются слабо нестационарные неизотермические управляемые процессы транспорта газа,что позволяет использовать ряд упрощающих предположений о характере течения. Предлагается интегрально-разностная модель распределения давления газа вдоль трубопровода, полученная на основе метода малого параметра и декомпозиции краевой задачи в рамках операционного исчисления. Рекуррентные процедуры последовательного интегрирования можно реализовать как стандартными методами, так и на основе предыдущей аппроксимации ядер интегральных операторов и их аргументов.
Программно-аппаратный комплекс для анализа и синтеза моделей элементов сложных механических систем
(НТУ "ХПИ", 2004) Ткачук, Николай Анатольевич; Гриценко, Геннадий Дмитриевич; Глущенко, Э. В.; Ткачук, Анна Владимировна
The hardware-software complex for the analysis and synthesis of models of the complicated mechanical systems elements is offered. The complex realizes a numerical-experimental method of researches. In a basis is the generalized parametrical approach and the specialized researching systems.
Локализация энергии при электромагнитной и тепловой диффузии в металлах
(НТУ "ХПИ", 2004) Автономова, Людмила Владимировна; Степук, Александр Владимирович
It is considered the possibility for energy localization under the pulse magnetic field diffusion. The features of parabolic equation solutions under the vary initial and border conditions has been searched. It has been found that the energy time-space localization might be achieved in fields 2-3 times higher than critical ones and the limited time uprising for an initial magnetic field.
Об упругом ударе
(НТУ "ХПИ", 2004) Герман, Эдуард Евгеньевич; Кныш, В. А.; Ушамирский, Б. А.
This paper reports about development of engineering methods for mechanic systems by impingement attack. The base of investigation consists on energy balance method. Duration of shock, maximum contact efforts and strain items in impingement items define by law of conservation of mechanical energy. Elastic impact of rod and sphere on absolute stiff barrier and percussion interaction of two moving rod be described. Method proposed in this paper permits to get the simple compute dependent, convenient to engineering application. Theoretic results are compared with experiment and trust of entry theoretic prerequisites is supported. Model of elastic impact proposed in the paper can be used for not great speeds of item in the moment of impingement.
Компьютерное моделирование осесимметричных течений жидкости в каналах сложной формы
(НТУ "ХПИ", 2004) Суворова, И. Г.
The paper considers theoretical principles of the R-functions method application to axisymmetric fluid in the channel of complicate form. The computer-based models of such fluid are created. Also the efficiency of one based on computation of the real channel are showed.
Расчет статики кольцевых пластин методом рекуррентных соотношений
(НТУ "ХПИ", 2004) Данилов, В. Н.
In the article the problem solving which is offered describe a condition of a ring slice by a method of recurrent ratio. On the known tasks the advantages of this method as contrasted to by known methods are shown and the obtained outcomes are parsed. Capability of the solution of compound systems also is shown which comprise a ring slice.
Анализ остаточных напряжений в автофретированном толстостенном цилиндре после механической обработки
(НТУ "ХПИ", 2004) Львов, Геннадий Иванович; Таранюк, Владимир Иванович
The paper discusses the common statement of problems of determination of residual stresses after autofrettage of a thick-walled cylinder and additional machining. Analytical statement of the given problem is resulted. Numerical realization is carried out in finite-element program complex ANSYS.
Идентификация ударного нагружения пластины на основе экспериментальных данных
(НТУ "ХПИ", 2004) Янютин, Е. Г.; Ярещенко, В. Г.; Воропай, Алексей Валериевич
The results of identification an unknown impact load of rectangular plate is presented. The input data for identification is taken from the experimental researches. The problem is reduced to the first-kind Volterra integral equation, which is solved numerically by Tikhonov's regularization method.
Перспективы улучшения работы эвольвентных прямозубных передач
(НТУ "ХПИ", 2004) Кириченко, А. Ф.; Бережной, Виталий Александрович
Stress strain states of spur gears are studied. Gear tooth calculation of volumetric stress strain state by method of finite element is performed. The calculation results of modification spur gears with by orifice along tooth axis.
Влияние нестационарности процесса теплопроводности на термическое сопротивление тепловой изоляции
(НТУ "ХПИ", 2004) Капинос, Василий Максимович; Пустовалов, Владимир Николаевич; Мезерная, Мария Витальевна
For the transient conduction predictions the relations which describe convective heat exchange are used in the same form as for the steady-state conduction, which could not be always justified. In this connection the approximate solution of the transient conduction problem for an unlimited plate was considered with the replacement of its thermal resistance by the boundary conditions of the third kind. It is shown that the conventional heat transfer coefficient on the insulated plate in the form of the ratio of.
Распределение температуры в трубном пучке при поперечном обтекании
(ru, 2004) Капинос, Василий Максимович; Пустовалов, Владимир Николаевич; Смородская, Инна Васильевна
At the cross-flow in a tube bundle in consequence of the gas temperature drop there is the different temperature of the tube walls. Because of that different heat deformations and stresses of the tubes arises, which can result in the failure of the tubes-plate juncture. The approximate method of the temperature distribution in a tube bundle is proposed.
Решение краевых задач статики ортотропных сферических оболочек с отверствиями
(НТУ "ХПИ", 2004) Сало, В. А.
The approach is suggested to definition of the stress-strained state of elastic spherical shells with holes. The used RVR-method is based on Reissner's variational principle, I.N.Vekua's method, R-functions theory, the common equations of the three-dimensional theory of an elasticity and algorithm for two-sided estimation of exactitude of approached solutions of the mixed variational problems. Efficiency of the method is shown on examples.
Раціональне технологічне нагрівання при зборці колісних пар залізничного рухомого складу
(НТУ "ХПІ", 2004) Андрєєв, Арнольд Георгійович; Добровенський, Ю. М.; Романов, С. В.; Щепкін, Олександр Віталійович
On the basis of the available experimental data the systematic numerical research of one piece rolled railroad car wheel were made using technological heating by induction-heating devices which allowed the establishment of the laws of the stress-strain state of the wheel set elements, during its thermal assembly. The optimization was conducted with restrictions on stresses and temperatures.
К вопросу анализа и синтеза элементов биомеханических систем
(НТУ "ХПИ", 2004) Ткачук, Николай Анатольевич; Веретельник, Юрий Викторович
The development of methods for the volumetric modelling of endoprosthetic operations on the locomo-torium and spine, postoperative complications is proposed, for determination of prosthetic elements strength and rigidity and for choosing of optimum operative scheme and prosthetic parameters taking into account postoperative complications.
Оптимизация элементов конструкций по прочностным и динамическим характеристикам
(НТУ "ХПИ", 2004) Симсон, Эдуард Альфредович; Назаренко, Сергей Александрович; Анацкий, Юрий Петрович
Structural optimization 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 are investigated. The developed mathematical apparatus application are examined.
Исследование переходных процессов при перемотке проволок и прядей в канатном производстве
(НТУ "ХПИ", 2004) Бохонский, А. И.; Хромов, Е. В.
Investigate torsion oscillations in act of twist ropes ofropeweving machines.
Исследование НДС толстостенной гиперупругой эллипсоидальной оболочки с относительно жесткими включениями (модель левого желудочка сердца)
(НТУ "ХПИ", 2004) Кантор, Борис Яковлевич; Яблучанский, Н. И.; Мисюра, Е. Ю.
The geometrically and physically nonlinear statical axisymmetric problem for the investigation of the stressstrain state of the hyper-elastic thick-wall ellipsoid loaded by the internal pressure (the model of a left ventricle heart in the diastole) was formulated. The model comprises two relatively hard inclusions (the base of the heart and the infarction zone). The problem was solved by developing the variational principle of possible displacements in the increments, which was used in the step-by-step algorithm of the finite element method. Influence of the kind and dimensions of the infarction zone on the stress intensity and also dependence of the end-diastolic volume of the left ventricle on the infarction zone volume was studied. It was determined that the maximum values of the stress intensity arises by the endocardial inclusion and increases with the angle of the infarction zone; increase of the angle of the infarction zone decreases the end-diastolic volume, the minimum volume arises by the endocardial inclusion.