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Information × Registration Number 0223U001622, 0120U102067 , R & D reports Title Scientific fundamentals of conversions for critical revolutions into non-critical, resonance frequencies into non-resonance and forces by Euler into non-critical for military and non-military technical objects popup.stage_title Head Goroshko Andrii Volodymyrovych, Доктор технічних наук Registration Date 01-02-2023 Organization Khmelnytskyi National University popup.description2 The object of research is loss of stability and balance at critical rotations and resonance frequencies by rotors and oscillating systems, and critical compressive forces (according to Euler) by longitudinally loaded rods. The purpose of the work is to develop the theory and practice of creating non-critical rotors, non-resonant oscillating systems in a certain frequency range (or at all frequencies) and long rods that do not have critical forces (according to Euler). Research methods. Analysis of the stability and accuracy of solutions to inverse problems is based on the principles of linear algebra, matrix theory, and mathematical and applied statistics. Bending theory was used for theoretical studies of rotor identification. Experimental studies were carried out by the methods of electric tensometry measurement and vibrography using electrodynamic shakers, strain gauges, vibrometers, oscilloscopes and personal computers. The validity of the theoretical provisions is confirmed by the results of experiments and the practice of industrial use of the developments. The possibility of creating non-critical rods, rotors and resonance-free systems is substantiated. Parametric identification methods have been developed to increase the accuracy of the calculation of resonance modes. A resonance-free method and a means of attaching the tested device to the vibrostand have been developed; the stress-deformed state of printed circuit boards is investigated and the methods and technical means of their vibration protection are substantiated. The models of the dynamics of drum machine rotors have been improved in order to significantly reduce the level of their vibrations. The results are implemented in the technology of reducing vibrations of the equipment of industrial enterprises and in the educational process of the Khmelnytskyi National University. The obtained results of the project have prospects for further development in the direction of creating resonance-free structur Product Description popup.authors Boiko Yulii M. Goroshko Andrii Volodymyrovych Drach Ilona V. Kachuryk Ivan I. Kovtun Igor I. Kopei Volodymyr Bohdanovych Moroz Victor A. Petrashchuk Svitlana Anatoliivna Royzman Vilen P. Tkachuk Vitaliy P. popup.nrat_date 2023-02-01 Close