ANALYSIS OF MODELS FOR THE INVESTIGATION OF DYNAMIC SPECIFICATIONS OF BOARD RADIOELECTRONIC SYSTEMS
Background. Study the dynamic characteristics of boards radioelectronic systems (RES) carried out in order to identify the vibro-terrain boards and determine the natural frequencies and mode shapes of their oscillations. Analysis different models of boards by using software package ANSYS, based on the finite element method. These data are necessary for calculating the loads experienced by electric radio mounted on the board, and to evaluate the stresses arising during deformation boards to improve the reliability and vibrostability of RES. The goal of the study is to analyze different models of boards RES and determine the natural frequencies and mode shapes of their oscillations. Materials and methods. Implementation of research objectives were achieved using numerical methods and software package ANSYS, based on the finite element method applied to different models boards. Results. The results show that the choice of a model describing the dynamic behavior of the board, significantly affects the simulation results and determines the accuracy of the calculation of vibration resistance boards RES. Conclusions. Analysis of the results of numerical modeling of flexural vibrations boards with elements showed that when calculating the dynamic characteristics of the board must take into account the presence of ERE, their location on the board and method of attachment to it. In determining the dynamic characteristics of the boards should be considered the most accurate model based on the application of the finite element method, which takes into account all the basic properties of the board and mounting method ERE to the board.