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Год выпуска: 2020
Год выпуска: 2024
Год выпуска: 2024
Год выпуска: 2025
Год выпуска: 2024
Количество страниц: 8 с.
The migration of point defects in metals contributes to the transfer of mass and energy during plastic deformation, heat treatment, irradiation, etc. In this regard, the study of such physical processes of nonlinear dynamics of the crystal lattice of metals is an urgent task. In this paper, the dynamics of 2-crowdion and the processes of energy transfer in tungsten are studied, aimed at understanding the mechanisms of defect formation and energy dissipation under extreme temperatures and pressures. It is known that crystal lattices accumulate a large number of defects under external influence, such as vacancies, dislocations, and grain boundaries. All these defects create internal stress fields that will affect the dynamics of crowdions. Using the methods of molecular dynamic modeling and embedded atom model, the propagation of 2-crowdions in a three-dimensional structure was studied. The main results show that the formation of 2-crowdions occurs at critical values of the excitation energy and depends on the initial configuration of the system, where 2-crowdions initiate chain processes of energy transfer through the atomic lattice. It is revealed that the depth of passage of the 2-crowdion linearly depends on the magnitude of the initial energy. The obtained spatiotemporal characteristics of the energy distribution demonstrate the role of 2-crowdions in the local concentration of energy and its subsequent transfer through atomic bonds, which leads to the formation of point defects. These results are important for the design of new radiation-resistant materials, as they help predict the material’s resistance to high-energy influences. The work contributes to the understanding of the physical foundations of energy dissipation and the behavior of defects in refractory materials used in thermonuclear fusion and other high-temperature processes.
Динамика 2-краудиона и перенос энергии в вольфраме: атомистическое моделирование / Ю. Р. Шарапова, А. М. Казаков, М. Н. Семёнова [и др.] ; Уфимский университет науки и технологий, Политехнический институт (филиал) СВФУ, Институт проблем сверхпластичности металлов РАН // Вестник Северо-Восточного федерального университета им. М. К. Аммосова. - 2024. - Т. 21, N 4 (98). - С. 73-80. - DOI: 10.25587/2222-5404-2024-21-4-73-80
DOI: 10.25587/2222-5404-2024-21-4-73-80
Количество страниц: 8 с.
The recent failure of attempts to extract the rotational energy of the Earth by unipolar induction methods suggests a need for further research on unipolar induction. It is implied by the special relativity theory that the interaction of electric charge and magnet in unaccelerated motion depends only on the relative rate. The electromotive force of unipolar induction in a complete electrical circuit depends only on the relative rotation of the magnet and the connected through slide contacts voltmeter. To ascertain if the electric field resulting from the magnet’s rotation in an inertial frame of reference or in a frame of reference rotating in a magnetic field is the result of absolute or relative rotation, it is necessary to measure the field. For this purpose, the paper introduces the experiment with the relative rotation of a ring-shaped magnet and a cylindrical capacitor. The capacitor is permanently connected through sliding contacts to the electrostatic meter. The electrostatic meter detects the potential difference on the capacitor while the magnet or capacitor is being rotated. The measurements showed that the potential difference on the capacitor is depends not on the capacitor rotating in case of a stationary magnet or a magnet rotating while the capacitor is stationary. It is close to zero when the capacitor rotates with the magnet. According to the research results, the interaction of the electric charge and magnet in the nonrelativistic case depends on the relative rotation rate. This interaction is described by the Lorentz formula.
Тимофеев, В. Б.
Униполярная индукция и относительное вращение / В. Б. Тимофеев, Т. Е. Тимофеева ; Северо-Восточный федеральный университет им. М. К. Аммосова // Вестник Северо-Восточного федерального университета им. М. К. Аммосова. - 2024. - Т. 21, N 4 (98). - С. 65-72. - DOI: 10.25587/2222-5404-2024-21-4-65-72
DOI: 10.25587/2222-5404-2024-21-4-65-72
Количество страниц: 9 с.
The article considers the potential for fuel and energy savings through the integration of heat pump units (HPUs) into the existing thermal power generation scheme of the Yakutsk combined heat and power plant (CHP). Currently, one of the promising energies saving technologies is heat pump units (HPU). The Yakutsk CHP, with a total thermal output capacity of 450 Gcal/h, currently relies on five hot water boilers: two KVGM-100 units, two PTVM-100 units, and one PTVM-50 unit. According to the United Cycle (UC) program, a thermal scheme simulation was conducted to assess the impact of incorporating HPUs. The study examined two operational modes: (1) with HPU operation and (2) without HPU operation. Heat load calculations were performed for both modes, analyzing boiler operation and HPUs' performance. The results demonstrate that integrating HPUs into the thermal scheme leads to a reduction in boiler plant. When preheating return mains water at 10°C, the HPUs achieve a thermal load of 55.6 Gcal/h, representing 12.3% of the total heat generation capacity. The article determined that by employing HPUs for boiler unloading, fuel consumption can be reduced by 12.4%. These findings highlight the effectiveness of integrating HPUs into the Yakutsk CHP scheme, presenting a viable approach to improving fuel efficiency and reducing operational costs.
Реев, В. Г.
Анализ внедрения тепловой насосной установки в схему Якутской ТЭЦ / В. Г. Реев ; Северо-Восточный федеральный университет им. М. К. Аммосова, Институт физико-технических проблем Севера им. В. П. Ларионова, Арктический научно-исследовательский центр Республики Саха(Якутия) // Вестник Северо-Восточного федерального университета им. М. К. Аммосова. - 2024. - Т. 21, N 4 (98). - С. 56-64. - DOI: 10.25587/2222-5404-2024-21-4-56-64
DOI: 10.25587/2222-5404-2024-21-4-56-64
Количество страниц: 11 с.
Исследована численная программа методом конечных элементов, применяемая к поведению аэродромных покрытий для определения механизмов повреждения конструкций дорожных покрытий при нагрузках высокой интенсивности и определения критического реагирования. Данное исследование на аэродромных покрытиях подтверждает, что шестиколесные тележки для самолетов или трехколесные оси тяжелых грузов на дорожном покрытии в основном создают продольные трещины из-за максимальных поперечных деформаций, а четырехколесные тележки для самолетов или тандемные оси в основном создают поперечные трещины из-за максимальных продольных деформаций, например, в дорожных покрытиях. Моделирование проводилось на основе квазистатических сравнений конфигураций шасси. Эти анализы предоставили данные о влиянии помех при изменении расстояния между колесами или опорами, сравнения между различными конфигурациями шасси A340, B777 и с их основными конкурентами. Предложена многослойная линейная модель, рассматривающая конструкцию гибкого покрытия, которая будет более рациональной, чем текущий метод CBR.
Numerical analysis of flexible airfield pavements behaviour submitted by large aircraft: influence of the position and configuration of the landing gear / Z. Ambassa, R. Medjo Eko, M. N. Safonova, A. A. Fedotov, N. E. Ammosova ; National Higher Polytechnic School of Douala, University of Douala, International Higher School of Bridges and Pavements of Abidjan, University of Douala, M. K. Ammosov North-Eastern Federal University // Вестник Северо-Восточного федерального университета им. М. К. Аммосова. - 2024. - Т. 21, N 4 (98). - С. 45-55.- DOI: 10.25587/2222-5404-2024-21-4-45-55
DOI: 10.25587/2222-5404-2024-21-4-45-55
Количество страниц: 11 с.
The Yana River basin in the Yana-Indigirka Lowland is one of the richest regions of Yakutia in paleontological finds of animals representing the mammoth fauna with soft tissues. More than 130 years ago, a large collection of paleontological material was collected by the royal expedition led by A. A. Bunge and E. V. Toll (1885-1886), which is stored in the storerooms of the Zoological Institute of the Russian Academy of Sciences in St. Petersburg. Previously known unique finds on the middle reaches of the Yana River included the Lena horse body fragment (2009), juvenile bison (2009), collared lemming (2012), and Verkhoyansk foal (2018) discovered at the Batagaika location. In 2023, during field work, paleontological and palynological material was collected at the main locations of the Yana River basin. New data on the quantitative and percentage ratio of mammoth fauna species at the Khaastaakh locality are presented, as well as some morphometric indicators for a fragmented fossil bison body. For a comprehensive study of the localities, various methods of paleogeographic reconstructions were used, including paleontological, palynological and radiocarbon analyses. These methods were aimed at identifying temporal patterns of variability of natural conditions at the Pleistocene-Holocene boundary. The results of the latest findings supplement the information on the distribution of representatives of the mammoth fauna in the territory of Yakutia in the late Pleistocene and Holocene.
Новгородов, Г. П. Новые данные по местонахождениям мамонтовой фауны в среднем течении р. Яна (Северо-Восток Якутии) / Г. П. Новгородов, А. Н. Тихонов ; Северо-Восточный федеральный университет им. М. К. Аммосова, Зоологический институт РАН // Вестник Северо-Восточного федерального университета им. М. К. Аммосова. - 2024. - Т. 21, N 4 (98). - С. 34-44. - DOI: 10.25587/2222-5404-2024-21-4-34-44
DOI: 10.25587/2222-5404-2024-21-4-34-44