Radiation of maximum acoustic power by systems of hydroacoustic cylindrical piezoceramic transducers with circular polarization

• Main Authors: Oleksandr Ivanovych Drozdenko, Oleksandr Hryhorovych Leiko
• Format: Article
• Language: English
• Published: Igor Sikorsky Kyiv Polytechnic Institute 2018-04-01
• Series: Mìkrosistemi, Elektronìka ta Akustika
• Subjects: система випромінювачів; циліндричний п'єзокерамічний випромінювач; , механічна міцність
• Online Access: http://elc.kpi.ua/article/view/121316
• ISSN: 2523-4447; 2523-4455

Electroacoustic devices and systems are widely used in the modern world. Among these devices it is necessary to select those that are intended for work in water - hydroacoustic devices. The main reason why these devices need to be singled out separately is the difficult operating conditions in which they work. Any hydroacoustic device is designed to work with certain power capabilities within a given time interval in the specified operating conditions. However, there are a number of physical factors that limit these opportunities. These factors can be divided into internal and external. For hydroacoustic devices with sound emission, internal limiting physical factors are dynamic mechanical, electrical and thermal strength. External factors include the cavitation strength of the environment in which the system operates. Piezoceramic transducers are the nodes that carry out an mutual conversion of electrical and acoustic energy. The active elements of transducers have the lowest strength and are most susceptible to the influence of operational factors. Among the physical factors limiting the power capabilities of hydroacoustic transducers on the first place it is necessary to deliver mechanical strength. The purpose of this article is to solve the problem of arbitrary system formed by a finite number of circular cylindrical piezoceramic transducers with circular polarization sound emission, on condition of their maximum mechanical dynamic strength providing. Such solution will allow hydroacoustic systems with maximum levels of radiated acoustic power designing. In this article, the physical factors that limit the acoustic power maximum radiation possibility of arbitrary hydroacoustic emitters systems were analysed. They include mechanical, electrical and thermal strength of emitters systems. For the mechanical strength of piezoceramic emitters, the reasons limiting their magnitude have been determined. On the basis of their analysis the possible variants which technical implementation allows increasing the acoustic radiating power were proposed. It becomes possible if in the system of emitters oscillatory speed is the same and close to the maximum possible one without their mechanical destruction. For this variant the problem of maximum acoustic power radiation is formulated and solved by the method of coupled fields in multiply connected domains. In this case, the system of emitters can be arbitrary, formed by a finite number of hydroacoustic cylindrical piezoceramic emitters with circular polarization. Different ways of the considered emitters systems energy efficiency increasing were analyzed because of their physical fields parameters quantitative estimates obtaining possibility. Ref. 8, fig. 1.