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Information × Registration Number 0221U102335, 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 01-02-2021 Organization Taras Shevchenko National University of Kyiv popup.description2 The object of research - thin-walled structures and their elements - components of energy and transport facilities made of metals, alloys, composite materials; microelectromechanical systems; structures with thin coatings; constructions with a liquid with a free surface, pipelines with a moving liquid; structural elements in physical fields of different nature. The purpose of the work is to ensure the reliable operation and durability of responsible energy and transport facilities by studying their operational reliability and resource; development of modern means of control and criteria for loss of serviceability of structures and their elements; creating a model of an upgraded laser meter. Research methods - refined methods of analytical and numerical-analytical solution of problems of mechanics taking into account nonlinear behavior of materials and complicated structure of objects; computational and laboratory experiments. Recommendations for controlling the movement of the structure with the liquid with a free surface depending on the degree of nonlinearity of the interaction of the tanks with the liquid are developed. The influence of previous stresses and the level of external pressure on the amplitude and temperature-frequency characteristics of oscillations and fatigue behavior of a cylindrical elastomeric shell has been studied in detail. An asymptotic analysis of wave processes in a medium with variable characteristics and small dispersion is performed. The two-dimensional Kattaneo-Mindlin problem for circular and noncircular cylinders is considered. A new scanning system for a laser Doppler vibrometer based on the principle of intracavity amplification of reflected laser radiation has been developed. The morphology of gold nanofilms obtained by different methods on different substrates has been studied.  Product Description popup.authors Abramov Oleksandr A. Vasylev Igor Yu. Gapyak Igor V. Klimchuk Taras V. Lendel Vasylʹ V. Limarchenko Volodymyr О. Limarchenko Oleh S. Matsypura Volodymyr Т. Meknychenko Mykola M. Nefedov Oleksandr O. Ostos Oleksandr H. P'yatetsʹka Olena V. Rozumnyuk V'yacheslav І. Samoylenko Valeriy G. Samoylenko Yuliya І. Tarasov Andriy P. Trotsenko Yaroslav Р. Yarovoy Leonid С. popup.nrat_date 2021-02-01 Close