Methodological Foundations Protective Structures Development for Shielding Electromagnetic and Acoustic Fields




electromagnetic field, acoustic field, low-frequency sound, shielding, elastic modules


In many cases the simultaneous protection against electromagnetic and acoustic fields of wide frequency ranges is required. The complexity of such a task lies in the impossibility of significantly reducing low-frequency sound levels with traditional sound-absorbing materials, as well as the different requirements for materials that shield low-frequency and high-frequency electromagnetic fields. It is proposed to solve this problem by creating a two-layer structure, the front surface of which is solid, and the inner surface is perforated. The front panel can be made of non-conductive material. It is a variant of the Bekeshi panel and is mainly intended to reduce the level of low-frequency sound of a certain frequency with high amplitude. The perforation of the internal (metal) panel is chosen based on the need to provide shielding of electromagnetic and acoustic fields of certain frequencies or frequency bands. A calculator is provided for calculating the required panel parameters (linear dimensions, thickness, hole diameters, their number per unit of surface area). It is advisable to fill the space between the panels with a sound-absorbing material, for example, granulated polystyrene. It provides sound absorption of medium and high frequencies and makes the design broadband. The use of ferromagnetic material of the inner panel provides protection against the magnetic component of the ultra-low frequency electromagnetic field (mainly industrial). The perforation of the panel is calculated based on the waveguide theory of high-frequency electromagnetic waves. The results of tests of the effectiveness of facing metal-polymer material in the form of tiles are presented. The performance of the material is satisfactory for most industrial and domestic conditions. Determination of the mechanical properties of the material (Young's modulus, shear modulus and Poisson's ratio) showed that it is not inferior to known materials even with a large content of shielding substance. In order to rationalize the design of the structure, a priority factor and frequency (frequency band) is selected on the basis of live measurements of the electromagnetic and acoustic spectra. It is shown that the calculations have large volumes, and the solution of two-factor optimization problems is not always possible. Appropriate creation of application software to simplify the process of designing protective structures and rationalizing panel parameters based on the principles of reasonable sufficiency.

Author Biographies

Valentyn Glyva, Kyiv National University of Construction and Architecture

doctor of technical sciences, professor, head of the physics department

Oleksandr Zaporozhets, Research Organization Center of the Institute of Aviation

doctor of technical sciences, professor, head of the research department

Larysa Levchenko, National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute”

Doctor of Technical Sciences, Professor, Professor of the Department of Digital Technologies in Energy

Nataliya Burdeina, Kyiv National University of Construction and Architecture

Candidate of Pedagogical Sciences, Associate Professor, Professor of the Department of Physics

Vasyl' Nazarenko, State institution "Institute of Occupational Medicine named after Yu.I. Kundiyev of the National Academy of Medical Sciences of Ukraine"

doctor of biological sciences, senior researcher, head of the laboratory for the study and standardization of physical factors of the production environment


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