Browsing Выпуск 23 by Issue Date
Now showing items 21-40 of 48
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Кинематика зубчатых передач с некруглыми колесами
(БНТУ, 2008)В работе рассмотрена кинематика двух типов зубчатых передач с эллиптическими колесами. Получены формулы для угловой скорости и углового ускорения ведомого колеса, на основании которых построены графики зависимости указанных угловых характеристик от угла поворота ведущего колеса, вращающегося с постоянной угловой скоростью.2019-11-15 -
Даследаванне палёў сіл інерцыі пры качэнні аднародных цыліндрычных цел
(БНТУ, 2008)Special cases rocking on a plane, the convex and concave surfaces are considered. For research of fields of forces of inertia in case of non-uniform rocking the method of two centers for the first time is used.2019-11-15 -
Генерация кинематических моделей механических систем и исследование их движения с применением функций пакета Mechanical Systems
(БНТУ, 2008)In the present paper development cycles of models of mechanical systems in package Mechanical Systems are submitted. Definitions of the functions forming mathematical system of the analytical equations on the basis of which calculation of kinematics characteristics of model is carried out are resulted. The example of calculation and modeling the three-dimensional crank-slider ...2019-11-15 -
Моделирование разрушения сварного соединения в пакете LS-Dyna
(БНТУ, 2008)А crush model of а weldjoint was created in the paper.2019-11-15 -
Применение пк “ANSYS” к решению задач строительной аэродинамики
(БНТУ, 2008)Buildings and structures are affected externally by the blowing of wind in several aspects. Aerodynamic effects are the most important for multy-stored buildings. The aerodynamic effect is concerned with the configuration of the air flow in the building domain. This configuration determines the distributions of pressure and velocity on the building surfaces. In paper are presented ...2019-11-15 -
Сравнение различных вариантов конечно-элементного моделирования стальной двутавровой балки в среде ANSYS Workbench
(БНТУ, 2008)The article is devoted to describing the results o f finite element modeling o f console fixed H-beam with application o f different types and sizes o f finite elements. The comparison o f the received results with results of analytical calculations is resulted in the article; also the estimation o f accuracy o f various variants o f modeling is given here.2019-11-15 -
Совместное использование ANSYS и ADAMS для динамического моделирования систем
(БНТУ, 2008)ANSYS doesn’t fit to analyze dynamics/kinematics of the mechanical mechanisms and ADAMS doesn’t fit for finite element analyzing the parts of these mechanisms. The paper deal with combining method of computer simulation programs ADAMS and ANSYS to analyze and simulate mechanisms with flexible components, approving the method feasible through simulating example.2019-11-15 -
Uwzglednienie oporu powietrza w analizie ruchu rzucanej monety
(БНТУ, 2008)Numerical analysis of three dimensional coin tossing is presented. Coin model includes air resistance. It is assumed that the air resistance force is proportional to the velocity. Comparison of results with and without the air resistance shows that the air friction may be nonnegligible.2019-11-15 -
Расчет скоростей и ускорений элементов составных механизмов с применением пакета Mechanical Systems системы Mathematica
(БНТУ, 2008)In the present paper the algorithm of calculation of velocities and accelerations of components of mechanical system in Mathematica package Mechanical systems is submitted. The example of calculation of velocities and accelerations of elements of brake draft of a back suspension bracket of the automobile is resulted.2019-11-15 -
Влияние многосуставных мышц на целенаправленное движение человека
(БНТУ, 2008)The equations ofpurposeful movement of the person who is carrying out exercises on sports shells, possessing elastic properties in the working part, are deduced without taking into account functionalities of muscular system of the person. Actually, the realization of the physical dependences which described by models of movement and have been not reflected in the equations, depends ...2019-11-15 -
Компоновочные схемы для моделирования трансмиссионных зубчатых механизмов
(БНТУ, 2008)While modeling transmission, two main types of models are used: a kinematic scheme and a CAD assembly. Both types have their own advantages and disadvantages as well. The kinematic scheme is flat and it doesn't contain special data to calculate loads. The CAD assembly - quite the contrary — is too detailed and it is rather hard to create this kind of model. This paper presents ...2019-11-15 -
Численное моделирование механического поведения наноструктуры графена, содержащей разрез
(БНТУ, 2008)The mathematical model of graphen nanostructure containing a cut is constructed and realized in package Mathematica. Dependences of forces arising in valence bonds at loading and Young modulus from length of defect are investigated. It is shown, that at edge of a cut forces grow in some times. Young modulus decreases almost in two.2019-11-15 -
Тестер экспресс оценки прочности клеевых соединений
(БНТУ, 2008)The article deals with the results of work in designing a tester for making express evaluation of the adhesive joints strength. The working out of design and technology documentation of tester has been conducted by means of the computer-aided design programmer COMP AS 3D. The creation of the solid three-dimensional model allowed to mod- elize all stages of the process of the ...2019-11-15 -
Математическое моделирование одного класса задач теории оболочек
(БНТУ, 2008)The general methods of the resolution of the partial differential equations of the first order for a prescribed of the strain state of thin-walled elastic shells of the given type (momentless or pure moment) are obtained.2019-11-15 -
К вопросу об определении износа во вращательных кинематических парах рычажных механизмов
(БНТУ, 2008)It is necessary to construct hodographs of reactions for estimation of distribution of wearing in elements of turning kinematic pairs. However if both parts of pairs are mobile, the real picture of expected wearing can be received, having presented reaction in mobile systems of the coordinates connected with corresponding parts. The features of definition of reactions in mobile ...2019-11-15 -
Равнительный численный анализ механического поведения нанотрубки в случае применения разных механических моделей
(БНТУ, 2008)It was developed computer model of single-walled carbon nanotube on basis of valence-force-field approach. One performed computational experiments to determine mechanical characteristics (linear elasticity modulus, crosscut compression coefficient, shear modulus) according nanotube dimensions. One realized comparison present results with results obtained within Urey-Bradley model. ...2019-11-15 -
Statistical-mechanical description of orientational order tensor fluctuation by means of Fokker-Planck equation
(БНТУ, 2008)This article is devoted to derivation the evolution equation for the distribution function offluctuations of tensor order parameter on bases ofsolving of the Liouville equation by Zubarev method.2019-11-15 -
Моделирование динамического поведения жесткопластической криволинейной пластины с произвольным свободным отверстием
(БНТУ, 2008)А rigid, perfectly-plastic model of solids is applied to study the dynamic behavior of simply supported or clamped, arbitrarily shaped plates with an internal, free, arbitrarily shaped hole. Governing equations for dynamic behavior are obtained. Operating conditions of possible mechanisms of deformation are analyzed. Analytical expressions for the ultimate loads are obtained.2019-11-15 -
Иделизированная модель CALS-технологии для машиностроительного предприятия
(БНТУ, 2008)Чигарева, О. А. Иделизированная модель CALS-технологии для машиностроительного предприятия / О. А. Чигарева, В. А Чигарев // Теоретическая и прикладная механика : межведомственный сборник научно-методических статей / Белорусский национальный технический университет ; редкол.: А. В. Чигарев (пред. редкол.). – Минск : БНТУ, 2008. – Вып. 23. – С. 232-241.2019-11-15 -
Напряженно-деформированное состояния силовой системы ролик-кольцо в условиях контактного взаимодействия и объемного деформирования
(БНТУ, 2008)А three-dimensional field of stresses in the roller-ring active system is observed in the present paper. The field was obtained by superposing the field of stresses conditioned by action of normal and tangential elliptically distributed contact forces and by bending of the ring. A significant change of the state of stress in comparison with the solution for the pure contact problem ...2019-11-15