L. S. Nabokova1, F. R. Zagidullina2 1Siberian Federal University, Krasnoyarsk, Russian Federation 2St.Petersburg State Institute of Technology, St.Petersburg, Russian Federation
Keywords: высшее профессиональное образование, технологии образования, технологии дополненной и виртуальной реальности, инновационное образование, образовательные программы, higher professional education, education technologies, augmented and virtual reality technologies, innovative education, educational programs
The article explores the outlooks of the latest technologies related to augmented and virtual reality in the field of innovative higher education.. The relevance of the problem is explained by rapid development and implementation of information and communication technologies in different areas of social activity, including education which is caused by objective reasons and subjective preferences of new generations of students. Theories are applied in on a practice. The investigated technologies are considered as a method of professional communication "teacher-student". The objectives of the study include: 1) identifying the current state of implementation of mixed reality technologies in higher education in domestic and foreign practice; 2) determining the attitude of teachers to the use of the latest virtual technologies in the educational process; 3) presentation of practical results in the study area. Methodology. To achieve the purpose of the study, inductive-deductive method and methods of situational analysis are used. The conclusions are based on the principles of determinism, the results of expert interviews are made using the methods of sociological research. Results. The research results in successful implementation of mixed reality technologies in higher education, as well as the identification of a positive attitude of teachers of the Siberian Federal University to the use of the latest technologies of augmented and virtual reality in the educational process. The article describes the AR-project called ”SFU SCIENCE” with application of modern augmented reality technologies. Conclusions. Technologies of augmented and virtual reality have positive results and further prospects of introduction in educational process of domestic and foreign higher education. This process is interdependent: on the one hand, teachers are ready to use the latest technologies for more effective communication ”teacher-student” and already successfully use such educational technologies in their work; on the other hand, students are interested in new products in education and develop projects of AR and VR technologies for different specialties.
Bashkir State Pedagogical University named after m. Akmully
Ufa, Russian Federation
Keywords: professional education system, 4th generation standards, special and university competencies, professional education issues, regional production cluster
The article considers a testing approach to explanation of special and university competencies of prospective specialists through detailed analysis of professional and educational issues of the regional production cluster.
I.S. Chizhmakova1,2, A.V. Nikitin1 1V.E. Zuev Institute of Atmospheric Optics of Siberian Branch of the Russian Academy of Science, Tomsk, Russia 2National Research Tomsk State University, Tomsk, Russia
Keywords: поверхность потенциальной энергии, SF, октаэдрическая группа, potential energy surface, ocatahedral group
For the first time, a 15-dimensional analytical form was obtained and the potential energy of the SF6 molecule in the ground electronic state was found ab initio . An optimal mesh of geometries was constructed, which, taking into account the full symmetry of the molecule, unambiguously determines the potential energy surface of the sixth order. Using the MP2 method with the cc-pVTZ base set, the potential energy surface of the fourth order was calculated.
K. Tang1, J. Wang1, X. Chen1, N. Zhou2 1National Key Laboratory of Transient Physics, Nanjing University of Science and Technology, Nanjing, 210094, China 2Department of Criminal Science and Technology, Nanjing Forest Police College, Nanjing, 210023, China
Keywords: стержни с облицовкой, вольфрам марки 93W, алюминиевый сплав марки 1060Al, титановый сплав марки TC4, сталь марки 4340, преграда, соударение, проникание, разрушение
Ballistic experiments, numerical simulations, and theoretical model investigations of the penetration performance of homogeneous and jacketed rods into a semi-infinite target are presented. The striking velocities vary between 0.9 and 3.3 km/s. The effects of the jacket material, striking velocity, and initial kinetic energy on the penetration performance and damage mechanisms are analyzed. The results show that jacketed rods provide better penetration performance than homogeneous rods with the same initial kinetic energy. For a fixed ratio of the jacket radius to the core radius, it is preferable to use a jacket material with a lower density and strength that can provide the lowest required flexural stiffness.
N. V. Bukrina1, A. V. Baranovskii2 1Institute of Strength Physics and Materials Science, Siberian Branch, Russian Academy of Sciences, Tomsk, 634055, Russia 2Tomsk Polytechnic University, Tomsk, 634050, Russia
Keywords: высокотемпературный синтез, тепловой взрыв, математическое моделирование, high-temperature synthesis, thermal explosion, mathematical simulation
Synthesis of a composite of powder mixtures is experimentally studied in a thermal explosion. A mathematical model for initiating a reaction that allows for the main physical and chemical phenomena changing the phase composition of a compact is formulated. It is shown that simulation results qualitatively agree with experimental data.
S. S. Kurennov
National Aerospace University Kharkiv Aviation Institute, Kharkiv, 61000, Ukraine
Keywords: клеевое соединение, аналитическое решение, двумерная модель, adhesion bond, analytical solution, two-dimensional model
A simplified two-dimensional model of a lapped adhesion bond is proposed. The problem of a stress state of an adhesion bond, along the surfaces of which nonglued regions are located, is solved analytically in the assumption that the cross-sectional displacements of carrier layers equal zero. The resulting solution is a functional series, with eigenfunctions being nonorthogonal. It is shown that the presence of nonglued regions may significantly increase stresses near the edge of the adhesion layer.
A. S. Begun1, L. V. Kovtanyuk1, A. O. Lemza2 1Institute of Automation and Control Processes, Far Eastern Scientific Center, Siberian Branch, Russian Academy of Sciences, Vladivostok, 690041, Russia 2Far Eastern Federal University, Vladivostok, 690091, Russia
Keywords: упругость, пластичность, ползучесть, вязкость, большие деформации, elasticity, plasticity, creep, viscosity, large deformations
The theory of large deformations is used to solve a problem of an elastic-viscoplastic material placed in a gap between two coaxial cylindrical surfaces, with one of them rotating with an alternating velocity and the other one at rest. It is shown that an increase in the stresses in a cylindrical layer due to a mechanical influence on it initially causes irreversible creep strains because of viscosity of the material and then the accumulation of plastic strains because of the arrival of stress states at the loading surface. The unloading is accompanied by a plastic strain and then a viscous one. The stress-strain parameters of the medium with a varying rotation velocity of the cylinder are calculated. Stress relaxation after its complete stop is described.
A. A. Golyshev1,2, A. M. Orishich1,2, A. A. Filippov1 1Khristianovich Institute of Theoretical and Applied Mechanics, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630090, Russia 2Novosibirsk State University, Novosibirsk, 630090, Russia
Keywords: аддитивные технологии, лазерная наплавка, СО-лазер, карбид вольфрама, никель, микроструктура, микротвердость, безразмерные параметры, additive technologies, laser cladding, CO2 laser, tungsten carbide, nickel, microstructure, microhardness, dimensionless parameters
The influence of the laser beam parameters (power, motion velocity, and focus position) on the characteristics of the track being formed (size, elemental composition, and microhardness) is studied. If the difference in the laser radiation absorption coefficients in the heat conduction and “knife-like” regimes is taken into account, then the track sizes can be determined by a unified dependence on the energy parameter. The effect of the laser beam on the chemical composition and microhardness of cermet (WC-NiCrBSi) tracks is studied. Regardless of the track formation regime, these parameters are determined by the dimensionless parameter, which describes the degree of dilution of chemical substances. It is found that a track with the maximum mass fraction of tungsten and the greatest value of microhardness is formed at small values of the dimensionless parameter, which corresponds to the heat conduction regime. The microhardness of the deposited cermet structure is observed to be 4-5 times higher than the microhardness of the substrate material.
N. V. Bykov, A. S. Karneichik, A. A. Makarov, M. S. Tovarnov
Bauman Moscow State Technical University, Moscow, 105005, Russia
Keywords: высокоскоростная экструзия, методы ускорения тел, гидродинамический эффект, внутренняя баллистика, баллистические установки, деформация, high-velocity protrusion, body acceleration methods, hydrodynamic effect, internal ballistics, ballistic devices, deformation
Acceleration of projectiles in ballistic devices by means of high-rate extrusion of polyethylene through a conical nozzle is experimentally and theoretically studied. Quasi-one-dimensional gas-dynamic model of a polydisperse mixture of gas and powder particles and a viscoplastic model of a deformed piston are used. The results of numerical simulation of the process under study and the results of a series of shots from a powder ballistic device are given. The influence of the geometry of a conical transition and input velocity of the deformed body on the output velocity of a projectile is experimentally investigated.
Yu. P. Meshcheryakov1, A. A. Shtertser1,2, B. S. Zlobin1 1Design and Technology Branch of the Lavrent'ev Institute of Hydrodynamics, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630090, Russia 2Lavrent'ev Institute of Hydrodynamics, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630090, Russia
Keywords: взрывная камера, металлический экран, численное моделирование, эквивалентные напряжения, explosion chamber, metal shield, numerical simulation, equivalent stresss
Metal shields of various thickness made of various steels and used to protect the shells of explosion chambers from damage by debris and reduce the loads on the structural elements have been studied. Dependences of the equivalent stresses in the protective shields and shells explosion chambers and the final size of the gap between the shields and the shell on wall thickness, steel grade, and initial gap size were obtained by numerical simulation. Examples of the explosion chamber designs with protective shields are given.