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Resonances in the System of Shield-Coupled Hydroacoustic Piezoceramic Transducers

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Outcomes of the stress state investigations are presented for cylindrical hydroacoustic piezoceramic transducers on their operation in the shielded electroacoustic systems, which is defined by the maximum amplitudes of their vibration velocities and physical parameters of piezoceramic materials. The calculation model of the shield–transducer system takes account of the coupling between the electric, mechanical, and acoustic fields of its piezoceramic transducers in the energy conversion process and of multiple interchange with radiated and reflected acoustic waves between the system elements on the formation of acoustic fields in the environment. For the sector shield–transducer system, the amplitude-frequency characteristics of dynamic stresses in the transducers were established to be quantitatively related to the electrophysical parameters of their piezoceramic materials. In this case, different vibration modes of the system are shown to be possibly excited, which are just responsible for the stress state of transducers. A significant increase in dynamic stresses of the transducers with the natural frequencies of the above vibration modes of the system, much larger as compared to those in isolated transducers, is especially dangerous. It is caused by a series of new resonances due to the interaction of system elements over the acoustic field in the environment as a result of multiple interchange with radiated and reflected acoustic waves. Maximum dynamic stresses are established to be dependent on the arrangement of transducers in the sector of the circular shield–transducer system and their energy conversion efficiency.

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Correspondence to A. P. Zinkovskii.

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Translated from Problemy Prochnosti, No. 6, pp. 25 – 35, November – December, 2019.

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Chepkov, I.B., Lapitskii, S.V., Zinkovskii, A.P. et al. Resonances in the System of Shield-Coupled Hydroacoustic Piezoceramic Transducers. Strength Mater (2020).

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  • electroacoustic system
  • transducer
  • piezoceramic material
  • stress state
  • resonance