UDC 629.1
TO THE QUESTION OF SIMULATION OF NATURAL FREQUENCIES OF OSCILLATIONS OF MULTIFACED PRISMS OF RESONANTLESS STRUCTURES OF ONBOARD RADIO-ELECTRONIC EQUIPMENT
S. I. Frolov, Ph.D. (Tech.), Penza, Russia, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
E. A. Danilova, Ph.D. (Tech.), Associate Professor, «Design and Production of Radio Equipment» department, Penza State University, Penza, Russia,
orcid.org/0000-0002-4426-3668, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
V. A. Trusov, Ph.D. (Tech.), Associate Professor, «Design and Production of Radio Equipment» department, Penza State University, Penza, Russia, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
I. I. Kochegarov, Ph.D. (Tech.), Associate Professor, «Design and Production of Radio Equipment» department, Penza State University, Penza, Russia,
orcid.org/0000-0002-6821-5353, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
N. K. Yurkov, Dr. Sc. (Tech.), Professor, Head of the department, «Design and Production of Radio Equipment» department, Penza State University, Penza, Russia,
orcid.org/0000-0002-2425-3470, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
The article presents the results of work on the development of an engineering method for calculating resonance-free prismatic thin-walled structures. Studies of natural frequencies of vibrations in multifaceted prismatic structures of on-board radio-electronic equipment are carried out. Simulation of natural oscillation frequencies for different number of faces and varying wall thickness of polyhedral prisms is carried out. Numerical solutions of test problems using a mathematical modeling package are presented, conclusions are drawn and recommendations are given for the creation of non-resonant, in a given vibration frequency range, thin-walled prismatic structures at the early stages of designing on-board electronic equipment. Graphs of the dependence of natural oscillation frequency on the number of faces of polyhedral prisms for different wall thicknesses are obtained, and the discrepancy between analytical and numerical solutions is estimated. It is shown that an increase in the number of faces leads to the degradation of ribs and changes in the properties of a cylinder. The possibility to use analytical dependence of determining natural frequency of vibrations of prismatic block structures for practical use is proposed and justified.
Key words: cylindrical shell, polyhedral prism, natural oscillation frequency, mathematical modeling, vibration, resonance, protection against mechanical impacts, thin-walled structures