<B>Д 64.051.09 (Технічні науки) </B>
Постійне посилання зібрання
01.05.02 - математичне моделювання та обчислювальні методи;
05.13.06 - інформаційні технології
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Перегляд <B>Д 64.051.09 (Технічні науки) </B> за Ключові слова "mathematical modeling"
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Документ Математичні моделі та методи обчислення процесів збудження та стійкості інтенсивних хвиль в приладах плазмової електроніки(Харків : Харківський національний університет імені В.Н. Каразіна, 2019) Приймак, Олексій Вікторович; Pryimak, Oleksii V.The research focuses on development of mathematical models and computational methods of excitation processes and modulation instabilities of the intense wave field in plasma electronics devices. Unlike vacuum systems, the use of plasma electronics devices makes it possible to change the frequency of radiation in a wide range, to create more compact devices, to accelerate beams to high energies at small distances, to transport bunches of high density and high current. However, the creation of plasma electronics devices is associated with significant problems, for example, with the difficulty of choosing an operating mode and determining the efficiency of oscillation output in a multimode mode, ensuring stability of oscillation radiation, with the presence of noise, etc. On the basis of the simulation results, the initial conditions of mathematical models were determined for enough accuracy of the numerical experiments of work points search for beam-plasma generators and the determination of the conditions for the ions heating. Such conditions not given in the literature are sufficient for the accurate description of the plasma by the hybrid method in the one-dimensional case.Документ Моделі взаємодії м'якого тіла з перешкодою і результати їх дослідження(Харків : Харківський національний університет імені В.Н. Каразіна, 2019) Світличний, Сергій Петрович; Svetlichniy, Sergey P.Sergey P. Svetlichniy. Models of soft body interaction with a target and the results of their analysis. – Qualification scientific paper, manuscript. Thesis for candidate degree in Technical Science: speciality 01.05.02 – mathematical modeling and computational methods. – National aerospace university named after N. E. Zhukovskiy “Kharkiv Aviation Institute”; V. N. Karazin Kharkiv National University, the Ministry of Education and Science of Ukraine, Kharkiv, 2019. In the thesis, for the first time, there has been developed and scientifically proved a hybrid model of contact interaction between soft body and aircraft engine blade. The model is used for multipurpose analysis of the influence of the blade design parameters on their reaction in case of soft body impact of different mass, with different speeds and at different angles. The model was verified by comparing the results of numerical simulation with the test results. The model allows to determine the loads acting on the blade without carrying out a full-scale experiment, which significantly simplifies, speeds up and reduces the costs of testing the blades for bird resistance. The simulation technique of soft body to engine blade interaction was further developed. The method differs from the existing ones by using smoothed particles method for discretization of the soft body, which allows to eliminate the problems of numerical instability and expand the scope of simulation and analysis of mechanical processes accompanying the impact.