TRANSACTIONS OF THE KRYLOV STATE RESEARCH CENTRE

Science journal

 
ISSN (print) 2542-2324 /(online) 2618-8244


Articles of The Transactions of KSRC








Polymeric-composite piezofilms for active elements of sound-transparent conformal sonar arrays



Full text article ( in russian)

Year

 
2021

Issue

 
20212

Volume

 
2

Pages

 
17-26

Caption

 
Polymeric-composite piezofilms for active elements of sound-transparent conformal sonar arrays

Authors

 
Mikheev D., Danilov Ye., Savitsky O., Paramonova N., Golovchenko M., Samoilov V., Gareev A.

Keywords

 
piezocomposite, polyvinyldenfluoride, zirconate-titanate system, hydroacoustics, conformal sonar arrays, sound-transparent equipment

DOI

 
10.24937/2542-2324-2021-2-S-I-17-26

Summary

 
This paper describes manufacturing technology and main dielectric and electrophysical properties of a new polymeric composite piezomaterial, highlighting its advantages over conventional piezoceramics. The study also suggests a manufacturing technology for active elements of a long conformal emitter/receiver array. Polymeric composite piezomaterial discussed in this paper was based on polyvinyldenfluoride (PVDF) and piezoceramics of lead zirconate-titanate system (CTS). Its main properties given in this study are: frequency curves for dielectric (tangent of dielectric oss angle, relative dielectric constant, quality factor) ane electromechanic (tension piezomodulus, acoustic impedance) proper ties. Performance parameters of the active element given in this paper are: directional patterns at different frequencies, effective piezomodulus and frequency-piezosensitivity curve. The paper shows that this composite material is equal to conventional PVDF films in terms of its dielectric properties and com pliance but offers better electromechanical parameters. Piezoconverter designs suggested in this study feature uniform frequency sensitivity diagram for both transmission and reception over the whole frequency band under investigation, as well as insensitivity to flow noise. New composite materials newly introduced to hydroacoustics also make these designs of receiving array elements insensitive to parasytic vibration of hull structures. The paper shows the advantages of the developed composite piezofilm as compared to conventional hydroacoustic piezoceramics. Pie zofilms, including composite ones, are as sensitive as ceramics but more compact, less heavy and feature much greater specific area of reception. A promising approach would be to further increase piezomoduli of film-based materials keeping their acoustic impedance low, which would result in greater operational efficiency of receiving sonar arrays.

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ISSN (print) 2542-2324 / ISSN (online) 2618-8244

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