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Information × Registration Number 0220U101111, 0118U001123 , R & D reports Title Models and means of increasing the operational reliability and resource of technical systems of energy and transport popup.stage_title Head Zhuk Yaroslav O., Доктор фізико-математичних наук Registration Date 03-02-2020 Organization Taras Shevchenko National University of Kyiv popup.description2 Object of study - thin-walled structures and elements that are components of energy and transport objects made of metals, alloys, composite materials; microelectromechanical systems, structures with thin coatings, structures with liquid with free surface, pipelines with flowing fluid; elements of structures in physical fields of different nature. The purpose of the work is the development of non-destructive and non-contact means of monitoring the state of mechanical loads of critical objects, the development of algorithms for analysis of stress-strain state of structures in the conditions of action of fields of different physical nature to improve the work of structural elements, devices and increase their service life. Research methods - analytical and numerical methods of mechanics, methods of verification of calculation data on the basis of modern measuring instruments. The calculation of a number of problems is performed, where the real earthquake parameters are used as the motion of the suspension point. It is shown that the pendulum suspension can be considered as a means of reducing the impact and the method for choosing the most favorable lengths of the pendulum suspension is substantiated. A mathematical model of a constant-power relay rocket engine designed to perform near-Earth inter-orbital flights has been constructed and tested. The influence of cyclic loading amplitude and volume content and orientation of CNT fibers on the thermal stability of polymer nanocomposite structural elements was investigated to evaluate the fatigue strength. Complex modules depending on frequency, temperature and amplitude were used to study the effect of dissipative heating on the mechanical stability of a core made of polymer nanocomposite material reinforced with CNT fibers, which is subjected to combined static and harmonic loading. A new type of asymptotic solution for the Korteweg-de Vries equation with variable coefficients with singular perturbation is constructed.  Product Description popup.authors Vasylev Igor Yu. Zhuk Yaroslav O. Kir'ev Anatoliy M. Klimchuk Taras V. Lezschoev Rostyslav S. Limarchenko Volodymyr O. Lymarchenko Oleh S. Ostos Oleksandr H. Ostrik Volodimir І. Pyatetska Olena V. Samoylenko Valeriy G. Samoylenko Yuliya I. Tarasov Andriy P. Yarovyj Leonid K. popup.nrat_date 2020-04-02 Close