@ARTICLE{Garus_S._Optimization_2021,
 author={Garus, S. and Sochacki, W. and Garus, J. and Sandu, A.V.},
 volume={vol. 66},
 number={No 2},
 journal={Archives of Metallurgy and Materials},
 pages={537-542},
 howpublished={online},
 year={2021},
 publisher={Institute of Metallurgy and Materials Science of Polish Academy of Sciences},
 publisher={Committee of Materials Engineering and Metallurgy of Polish Academy of Sciences},
 abstract={This work concerns the study of the coatings for the ultrasound frequency range as a quasi one-dimensional phononic crystal structure protecting a sea object against high resolution active sonar in the frequency range most commonly found for this type of equipment. The topology of the examined structure was optimized to obtain a band gap in the 2.2-2.3 MHz frequency band. For this purpose, a genetic algorithm was used, which allows for optimal distribution of individual elements of the ultrasound multilayer composite. By optimal distribution is meant to achieve a structure that will allow minimal reflectance in a given frequency range without height reflectance peaks with a small half width. Analysis of the wave propagation was made using the Transfer Matrix Method (TMM). As part of the research, 15 and 20-layer structures with reflectance at the level of 0.23% and 0.18%, respectively, were obtained. Increasing the number of layers in the analyzed structures resulted in finding such a distribution in which a narrow band of low reflectance was obtained, such distributions could also be used as bandpass filters. The use of a genetic algorithm for designing allows to obtain modern coatings, the characteristics of which result from the structure.},
 type={Article},
 title={Optimization of a Bandgap in the Ultrasonic Phononic Coating},
 URL={http://journals.pan.pl/Content/118812/PDF/AMM-2021-2-26-Garus.pdf},
 doi={10.24425/amm.2021.135890},
 keywords={reflectance coating, mechanical waves, phononic crystal, band gap, optimization},
}