ACTA

Designing Two-Band Mechanical Wave Filters Using Genetic Algorithm

W. Sochacki^a, J. Garus^a, J. Szmidla^a, M. Nabiałek^b, K. Błoch^b, P. Kwiatoń^a, B. Jeż^b, K. Jeż^b, S. Garus^a
^aDepartment of Mechanics and Fundamentals of Machinery Design, Faculty of Mechanical Engineering and Computer Science, Częstochowa University of Technology, ul. Dąbrowskiego 73, 42-201 Częstochowa, Poland
^bDepartment of Physics, Faculty of Production Engineering and Materials Technology, Częstochowa University of Technology, ul. Dąbrowskiego 73, 42-201 Częstochowa, Poland

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The paper uses a genetic algorithm to design a multilayer structure with two-band gaps in the assumed frequency range of mechanical waves. An appropriate objective function has been designed, allowing for a simultaneous minimization of the transmission from the given frequency ranges and the elimination of high transmission peaks with a small half-width. The paper presents an analysis of the acoustic waves frequency. The transmission of the studied structures was determined using the transfer matrix method algorithm. A single population consisted of 20 structures. In order to minimize the chance of finding solutions to the local minimum, mutations were used in the algorithm and 10% of random structures were introduced into each population.

DOI:10.12693/APhysPolA.139.479
topics: transfer matrix method, genetic algorithm, phononic multilayers, phononic bandgap