Физика список научных статей
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ИЗМЕРЕНИЕ ПОКАЗАТЕЛЕЙ ТЕПЛОЗАЩИТНЫХ СВОЙСТВ СЛУЧАЙНОЙ РАССЕИВАЮЩЕЙ СТРУКТУРЫ
Цель. Определение взаимосвязи между параметрами структуры материалов и показателями их теплозащитных свойств. Процедура и методы. Теоретический анализ и сопоставление теории и эксперимента на основании результатов двух методов практических измерений компонент теплопроводности случайной рассеивающей ...
2021 / Шампаров Евгений Юрьевич, Бугримов Анатолий Львович, Родэ Сергей Витальевич, Жагрина Инна НиколаевнаВАК
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EffECTS OF A PERPENDICULARLY APPLIED MAGNETIC FIELD ON HARMONICALLY DRIVEN QUASI-TWO-DIMENSIONAL ELECTRON GAS: THE STATIC MACROSTATES SYMMETRY BREAKING AND GENERATION OF EVEN HARMONICS IN SYSTEM OUTPUT
In this paper, we consider activation processes in a nonlinear metastable system based on a quasi-two-dimensional superlattice and study the dynamics of such a system, which is externally driven by a harmonic force in regimes of controlled instabilities. The spontaneous transverse electric field is...
2021 / Maglevanny Ilya I., Karyakina Tatyana I., Smolar Vladimir A.ScopusВАКRSCIMathSciNetzbMATH -
LORENZ-AND SHILNIKOV-SHAPE ATTRACTORS IN THE MODEL OF TWO COUPLED PARABOLA MAPS
We consider the system of two coupled one-dimensional parabola maps. It is well known that the parabola map is the simplest map that can exhibit chaotic dynamics, chaos in this map appears through an infinite cascade of period-doubling bifurcations. For two coupled parabola maps we focus on studying ...
2021 / Kuryzhov Evgenii, Karatetskaia Efrosiniia, Mints DmitriiScopusВАКRSCIMathSciNetzbMATH -
INCORPORATION OF FLUID COMPRESSIBILITY INTO THE CALCULATION OF THE STATIONARY MODE OF OPERATION OF A HYDRAULIC DEVICE AT HIGH FLUID PRESSURES
This paper is concerned with assessing the correctness of applying various mathematical models for the calculation of the hydroshock phenomena in technical devices for modes close to critical parameters of the fluid. We study the applicability limits of the equation of state for an incompressible...
2021 / Raeder Thomas, Chernova Alena A., Tenenev Valentin A.ScopusВАКRSCIMathSciNetzbMATH -
CALCULATION AND EXPERIMENTAL STUDY OF HEAT EXCHANGE IN A SYSTEM OF PLANE-PARALLEL CHANNELS WITH SURFACE INTENSIfiERS
This paper presents the results of numerical investigation, calculation analysis and experimental study of heat exchange in a system of plane-parallel channels formed by rectangular fins, which are applied in a heat removal device using heat tubes for power semiconductor energy converters. Passive...
2021 / Kaskov Sergey I.ScopusВАКRSCIMathSciNetzbMATH -
A TWO-CONTOUR SYSTEM WITH TWO CLUSTERS OF DIffERENT LENGTHS
A system belonging to the class of dynamical systems such as Buslaev contour networks is investigated. On each of the two closed contours of the system there is a segment, called a cluster, which moves with constant velocity if there are no delays. The contours have two common points called nodes....
2021 / Yashina Marina V., Tatashev Alexander G.ScopusВАКRSCIMathSciNetzbMATH -
NONLINEAR PROCESSES IN SAFETY SYSTEMS FOR SUBSTANCES WITH PARAMETERS CLOSE TO A CRITICAL STATE
The paper presents a modification of the digital method by S.K.Godunov for calculating real gas flows under conditions close to a critical state. The method is generalized to the case of the Van der Waals equation of state using the local approximation algorithm. Test calculations of flows in a shock...
2021 / Raeder Thomas, Mishchenkova Olga V., Koroleva M.R., Tenenev Valentin A.ScopusВАКRSCIMathSciNetzbMATH -
ON THE STABILITY OF THE ORBIT AND THE INVARIANT SET OF THOMSON'S VORTEX POLYGON IN A TWO-FLUID PLASMA
The motion of the system of N point vortices with identical intensity Γ in the Alfven model of a two-fluid plasma is considered. The stability of the stationary rotation of N identical vortices disposed uniformly on a circle with radius R is studied for N = 2,...,5. This problem has three...
2020 / Kurakin Leonid G., Lysenko Irina A.ScopusВАКRSCIMathSciNetzbMATH -
SOME LATTICE MODELS WITH HYPERBOLIC CHAOTIC ATTRACTORS
Examples of one-dimensional lattice systems are considered, in which patterns of different spatial scales arise alternately, so that the spatial phase over a full cycle undergoes transformation according to an expanding circle map that implies the occurrence of Smale--Williams attractors in the...
2020 / Kuznetsov Sergey P.ScopusВАКRSCIMathSciNetzbMATH -
MECHANICAL SYSTEMS WITH HYPERBOLIC CHAOTIC ATTRACTORS BASED ON FROUDE PENDULUMS
We discuss two mechanical systems with hyperbolic chaotic attractors of Smale--Williams type. Both models are based on Froude pendulums. The first system is composed of two coupled Froude pendulums with alternating periodic braking. The second system is Froude pendulum with time-delayed feedback and ...
2020 / Kuznetsov Sergey P., Kruglov Vyacheslav P., Sedova Yuliya V.ScopusВАКRSCIMathSciNetzbMATH -
AN APPROACH TO MOVING OVER OBSTACLES FOR A WHEELED JUMPING ROBOT
This paper approaches the issue of the jumping robot overcoming one step of a flight of stairs. A classification of obstacles according to the way they are surmounted is proposed, the basic concepts concerning the flight of stairs and the realization of a leap from one step to another are introduced....
2020 / Vorochaeva Ludmila Yu., Malchikov Andrei V., Savin Sergey I.ScopusВАКRSCIMathSciNetzbMATH -
ON GLOBAL TRAJECTORY TRACKING CONTROL FOR AN OMNIDIRECTIONAL MOBILE ROBOT WITH A DISPLACED CENTER OF MASS
This paper addresses the trajectory tracking control design of an omnidirectional mobile robot with a center of mass displaced from the geometrical center of the robot platform. Due to the high maneuverability provided by omniwheels, such robots are widely used in industry to transport loads in...
2020 / Andreev Aleksandr S., Peregudova Olga A.ScopusВАКRSCIMathSciNetzbMATH -
FEATURES OF THE SYNCHRONIZATION OF SPIRAL WAVE STRUCTURES IN INTERACTING LATTICES OF NONLOCALLY COUPLED MAPS
The features of external and mutual synchronization of spiral wave structures including chimera states in the interacting two-dimensional lattices of nonlocally coupled Nekorkin maps are investigated. The cases of diffusive and inertial couplings between the lattices are considered. The lattices...
2020 / Bukh Andrei V., Anishchenko Vadim S.ScopusВАКRSCIMathSciNetzbMATH -
INERTIAL CHARACTERISTICS OF HIGHER ORDERS AND DYNAMICS IN A PROXIMITY OF A SMALL CELESTIAL BODY
As is well known, many small celestial bodies are of a rather complex shape. Therefore, the study of the dynamics of a spacecraft in their vicinity, based on terms up to the second order of smallness in the expansion of the potential of attraction, seems to be insufficient for an adequate description ...
2020 / Burov Alexander A., Nikonov Vasily I.ScopusВАКRSCIMathSciNetzbMATH -
MODELING OF NONLINEAR WAVES IN TWO COAXIAL PHYSICALLY NONLINEAR SHELLS WITH A VISCOUS INCOMPRESSIBLE FLUID BETWEEN THEM, TAKING INTO ACCOUNT THE INERTIA OF ITS MOTION
This article investigates longitudinal deformation waves in physically nonlinear coaxial elastic shells containing a viscous incompressible fluid between them. The rigid nonlinearity of the shells is considered. The presence of a viscous incompressible fluid between the shells, as well as the...
2020 / Mogilevich Lev I., Ivanov Sergey V., Blinkov Yuriy A.ScopusВАКRSCIMathSciNetzbMATH -
RESEARCH ON THE DYNAMICS OF AN OMNIDIRECTIONAL PLATFORM TAKING INTO ACCOUNT REAL DESIGN OF MECANUM WHEELS (AS EXEMPLIfiED BY KUKA YOUBOT)
The subject of this study is an omnidirectional mobile platform equipped with four Mecanum wheels. The movement of the system on a horizontal plane is considered. The aim of this research is to study the dynamics of the omnidirectional platform, taking into account the design of Mecanum wheels: the ...
2020 / Adamov Boris I., Saipulaev Gasan R.ScopusВАКRSCIMathSciNetzbMATH -
CONTROL OF AN INVERTED WHEELED PENDULUM ON A SOFT SURFACE
The dynamics of an inverted wheeled pendulum controlled by a proportional plus integral plus derivative action controller in various cases is investigated. The properties of trajectories are studied for a pendulum stabilized on a horizontal line, an inclined straight line and on a soft horizontal...
2020 / Kiselev Oleg M.ScopusВАКRSCIMathSciNetzbMATH -
COMPLEX ENVELOPE VARIABLE APPROXIMATION IN NONLINEAR DYNAMICS
We present the complex envelope variable approximation (CEVA) as a useful and compact method for analysis of essentially nonlinear dynamical systems. The basic idea is that the introduction of complex variables, which are analogues of the creation and annihilation operators in quantum mechanics,...
2020 / Smirnov Valeri V., Manevitch Leonid I.ScopusВАКRSCIMathSciNetzbMATH -
ANOTHER SPECIAL CASE OF VIBRATIONS OF A ROLLING TIRE
We investigate a special case of vibrations of a loaded tire rolling at constant speed. A previously proposed analytical model of a radial tire is considered. The surface of the tire is a flexible tread combined with elastic sidewalls. In the undeformed state, the tread is a circular cylinder. The...
2020 / Kozhevnikov Ivan F.ScopusВАКRSCIMathSciNetzbMATH -
PHASE TRANSITION TO QUADRUPOLAR VORTICES IN A SPHERICAL MODEL OF THE ENERGY-ENSTROPHY THEORY - EXACT SOLUTION
A new energy-enstrophy model for the equilibrium statistical mechanics of barotropic flow on a sphere is introduced and solved exactly for phase transitions to quadrupolar vortices when the kinetic energy level is high. Unlike the Kraichnan theory, which is a Gaussian model, we substitute a...
2020 / Lim Chjan C.ScopusВАКRSCIMathSciNetzbMATH
