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Information × Registration Number 0224U001532, 0121U100380 , R & D reports Title Development and improvement of modern methods for studying the dynamics of promising rocket and space, aviation and transport systems popup.stage_title Head Pylypenko Oleh V., Доктор технічних наук Registration Date 25-01-2024 Organization Institute of Technical Mechanics of the National Academy of Sciences of Ukraine and the State Space Agency of Ukraine popup.description2  The object of research is dynamic processes in liquid-propellant rockets, road transport, technologies of vibration protection systems and air ducts of gas turbine engines (GTE). The aim of the third stage of the research is to develop methods to solve modern problems of rocket and space, aviation and transport system dynamics. Research methods are mathematical modelling, computational fluid dynamics, theory of oscillations, theory of automatic control systems, information-analytical, physical experiment. An approach to the analysis of pogo stability of liquid propulsion systems with a batch scheme of stage layout based on the use of Nyquist's criterion, generalised for the case of multichannel dynamic systems, has been proposed. A computational and methodological support for aerodynamic optimisation of inlet devices of aircraft GTE based on numerical simulation of three-dimensional gas flows has been developed. Based on the analysis of structural schemes for vibration protection of a spacecraft, a vibration protection design based on pneumatic elements with quasi-zero stiffness has been chosen. It is shown that this vibration protection system can be used as a radical means to reduce the level of pogo vibration accelerations of spacecraft of different masses. A modified pneumatic vibration protection module has been developed for a car driver's seat, which is superior in efficiency to existing models of similar purpose. The created scientific and methodological developments are aimed at improving the efficiency of liquid rocket engine systems and implementing scientifically sound competitive design solutions. The vibration protection module under research has static and dynamic parameters that can ensure high efficiency of the vibration protection system in damping shock and harmonic disturbances to spacecraft and other engineering objects. The use of optimisation methods is aimed at improving the quality of designing the inlet devices of aircraft GTE. Product Description popup.authors Bashlii Inna Dmytrivna Dolgopolov Sergiy Ivanovych Zinevich Natalia Kvasha Yurii O Kotelnikov Vadum Viktorovich Nikolayev Olexiy D. Osadchyy Oleksandr Patynka Emma V Petrushenko Nataly V Pylypenko Oleh Viktorovych Suhonis Igor Usenko Oleksandr L Khoryak Natalia V. popup.nrat_date 2024-01-25 Close