Электронный каталог

22.2
U93
Utenov, M. U
    Determination of displacements in cross-sections of four-bar mechanism linksfrom distributed dynamic loads and their animation using MAPLE [Текст] / M.U Utenov // Әл - Фараби ат. ҚҰУ Хабаршы = Вестник КазНУ им Аль - Фараби. - Алматы, 2018. - №2(98). - Р. 45-56
ББК 22.2

Рубрики: Механика

Кл.слова (ненормированные):
Механизмы -- подвижные стержневые системы -- перемещения -- распределенные динамические нагрузки
Аннотация: The links of high-speed mechanisms and manipulators are deformed under the action of inertiaforces and external loads. These deformations have significantly influence on the accuracy of execu-tion of the required law of motion by the operating point of the mechanism and the positioning ofthe manipulator grip. Accordingly, longitudinal and transverse displacements, angles of rotation ofcross-sections of links under the action of distributed dynamic and external loads are investigatedin this paper. The developed technique allows defining deformations of links of mechanisms andmanipulators and can be applied at their designing. To determine the transverse displacements,the angles of rotation of the cross-sections of the links – the basic differential equation of the elasticline of the beam, to determine the longitudinal displacements of the points of the links – Hooke’slaw and the boundary conditions of the computed scheme of the investigated linkages for elasticcomputation are used. The bending moment in the basic differential equation of the elastic line ofthe beam and the longitudinal force in Hooke’s law were determined by the theory developed bythe authors of the analytical definition of internal forces in the links of planar linkages with stat-ically determinate structures, taking into account the distributed dynamic loads from the massesof links, dead weight and from the acting external loads. According to the developed technique,programs are created in the MAPLE system and animations of the movement of mechanisms arereceived, with the construction on the links the diagrams of transverse, longitudinal displacementsand angles of rotation of the link cross-sections. The developed analytical technique for determin-ing deformations in the cross-sections of links is used to calculate the strength and stiffness ofelements of movable linkages.
Держатели документа:
ЗКГУ
Доп.точки доступа:
Zhilkibayeva, S.K
Baygunchekov, Zh.Zh

22.1
М 61
Minglibayev, M.Zh.
    Equations of motion of the restricted three-body problem with non-isotropically variable masses with reactive forces [Текст] = Уравнения движения ограниченной задачи трех тел с неизотропно изменяющимися массами при наличии реактивных сил / M.Zh. Minglibayev, A.T. Ibraimova // Известия НАН РК. Серия физико-математическая. - 2019. - №3. - С. 5-12
ББК 22.1

Рубрики: Математика

Кл.слова (ненормированные):
ограниченная задача трех тел -- неизотропное изменения масс -- реактивные силы -- уравнения движения -- математика
Аннотация: В ходе образования планетных систем, особенно в этапе нестационарности, часто доминирует гравитационное поле центральной протозвезды (например, протосолнце) и самой массивной протопланеты (например, протоюпитер). В связи с этим, рассматривается ограниченная задача трех тел с переменными массами, изменяющимися не изотропно в различных темпах, как исходная небесно-механическая модель движений малого тела в нестационарных протопланетных системах. Исходя из обобщенного уравнения Мещерского выведены дифференциальные уравнения ограниченной задачи трех тел в абсолютной системе координат, при наличии реактивных сил. При этом предполагается одновременно рост массы тел из-за присоединяющихся (налипания) частиц из космической среды, а также уменьшение массы тел за счет отбрасываемых частиц. Исходя из уравнения движения, полученные в абсолютной системе координат, выведены уравнения движения в относительной системе координат с началом в центре центральной протозвезды, при наличии реактивных сил. Обсуждается частные случаи полученных дифференциальных уравнения движения, рассмотренной нестационарной динамической системы, в относительной системе координат.
Держатели документа:
ЗКГУ
Доп.точки доступа:
Ibraimova, A.T.

22.3
M73
Minglibayev, M. Zh.
    New forms of the perturbed motion equation. [Текст] / M. Zh. Minglibayev, Ch. T. Omarov, A. T. Ibraimova // Reports of the National Academy of Sciences of the Republic of Kazakhstan. - 2020. - №2. - P. 5-13
ББК 22.3

Рубрики: physics

Кл.слова (ненормированные):
aperiodic motion along a quasiconical section -- variable mass -- unperturbed motion -- equatuions of pertubed motion in the form of the Newton equation -- perturbation theory -- unsteady gravitational systems
Аннотация: In this paper. on the basis of this class of aperiodic motion over a quasiconical section, various new forms of the perturbed motion equation in the form of Newton's equations are obtained.
Держатели документа:
WKU
Доп.точки доступа:
Omarov, Ch.T.
Ibraimova, A.T.

22.6
M73
Minglibayev, M. Zh.
    Equations of planetary systems motion. [Текст] / M. Zh. Minglibayev, A. B. Kosherbayeva // News of national academy of sciences of the republic of Kazakhstan. - 2020. - №6. - P. 53-60
ББК 22.6

Рубрики: astronomy

Кл.слова (ненормированные):
planetary systems -- variable mass -- Poincare elements -- theory of perturbations -- evolution equations
Аннотация: The study of the dynamically evolution of planetary systems is very actually in relation with findings of exoplanet systems.
Держатели документа:
WKU
Доп.точки доступа:
Kosherbayeva, A.B.

22.1
I-32
Ibrayev, A. T.
    Construction and application of a dynamic motion counting system for researching the properties of electron mirrors and cathode lenses. [Текст] / A. T. Ibrayev // News of national academy of sciences of the republic of Kazakhstan. . - 2021. - №6. - P. 114-120
ББК 22.1

Рубрики: Mathematica

Кл.слова (ненормированные):
motion -- reference frame -- coordinate transformation -- velocity -- interval invariance
Аннотация: Based on the analysis and consideration of the features of Galileo’s transformations, new inertial and dynamic reference frames of movements are obtained. In the new inertial reference frame, the main drawback of Galileo’s transformations, associated with the violation of the invariance of the intervals between events, is eliminated. The developed dynamic frame of reference makes it possible to conduct effective studies of movements in force fields. Elements of this dynamic frame of reference intuitively, without a detailed analysis of the meaning of the transformations used, have been successfully applied in a number of scientific works in the field of physical electronics, devoted to the construction of theories of electron mirrors and cathode lenses. Obviously, the new reference systems indicated in the work will find wide application both in the field of research and design of electron-optical devices and ion-beam technological installations, and in other branches of fundamental and technical sciences.
Держатели документа:
WKU

33
R24
Rasulov, S. R.
    Hydrodynamic features of suspensions and emulsions flows. [Текст] / S. R. Rasulov, G. R. Mustafayeva // News of national academy of sciences of the republic of Kazakhstan. . - 2021. - №2. - P. 99-104
ББК 33

Рубрики: Горное дело

Кл.слова (ненормированные):
hydrodynamics -- differential equation -- suspensions -- emulsions -- dispersed phase -- solid spherical particle -- turbulent flow -- pulsating motion
Аннотация: This scientific article is devoted to the problems associated with the flow of suspensions and emulsions and some simplifications of the real picture of the flow of a polydisperse medium are made. It is also stipulated that differential equations characterizing the motion of suspensions and emulsions should take into account the fundamental discontinuity of the medium and the physicochemical processes of heat and mass transfer occurring in it. Taking into account all these factors, a general equation for multiphase systems is proposed with certain simplifications that do not change.
Держатели документа:
WKU
Доп.точки доступа:
Mustafayeva, G.R.