Analysis and design of low frequency and high power flextensional transducer with double-grooves

Guo, Rongjing; Li, Shiyang; Li, Tangan; Sun, Xuan; Li, Lin; Sun, Sihao

doi:10.1016/j.apacoust.2019.01.016

Cited by 7 publications

(3 citation statements)

References 15 publications

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“…Flextensional transducers (FTs) are typical low-frequency transducers which are usually used in the underwater acoustics, in which the flexural vibration of the shell is excited by piezoelectric ceramics [ 1 , 2 , 3 , 4 ]. Since Harvey C. Hayes from the U.S.…”

Section: Introductionmentioning

confidence: 99%

Research and Fabrication of Broadband Ring Flextensional Underwater Transducer

Hong

et al. 2021

Sensors

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At present, high-speed underwater acoustic communication requires underwater transducers with the characteristics of low frequency and broadband. The low-frequency transducers also are expected to be low-frequency directional for realization of point-to-point communication. In order to achieve the above targets, this paper proposes a new type of flextensional transducer which is constructed of double mosaic piezoelectric ceramic rings and spherical cap metal shells. The transducer realizes broadband transmission by means of the coupling between radial vibration of the piezoelectric rings and high-order flexural vibration of the spherical cap metal shells. The low-frequency directional transmission of the transducer is realized by using excitation signals with different amplitude and phase on two mosaic piezoelectric rings. The relationship between transmitting voltage response (TVR), resonance frequency and structural parameters of the transducer is analyzed by finite element software COMSOL. The broadband performance of the transducer is also optimized. On this basis, the low-frequency directivity of the transducer is further analyzed and the ratio of the excitation signals of the two piezoelectric rings is obtained. Finally, a prototype of the broadband ring flextensional underwater transducer is fabricated according to the results of simulation. The electroacoustic performance of the transducer is tested in an anechoic water tank. Experimental results show that the maximum TVR of the transducer is 147.2 dB and the operation bandwidth is 1.5–4 kHz, which means that the transducer has good low-frequency, broadband transmission capability. Meanwhile, cardioid directivity is obtained at 1.4 kHz and low-frequency directivity is realized.

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Section: Introductionmentioning

confidence: 99%

Research and Fabrication of Broadband Ring Flextensional Underwater Transducer

Hong

et al. 2021

Sensors

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“…In order to meet the increasingly demanding requirements for underwater detection and communication, transducers with performances of low frequency, high power, light weight and small size are desired [ 4 ]. After several decades of development, some types of low-frequency transducers have been presented, for instance, flextensional transducers [ 5 ], free-flooded ring transducers [ 6 ], flexural transducers [ 7 ], etc. They can all be used as projectors because of their amazing performances of low frequency and high power [ 8 ].…”

Section: Introductionmentioning

confidence: 99%

Effect of Concave Stave on Class I Barrel-Stave Flextensional Transducer

2021

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To meet the requirements of low frequency, high power, small size and light weight, a type of Class I barrel-stave flextensional transducer employing improved concave stave is presented. As the key component of flextensional transducer, concave stave plays an important role in vibrating efficiently to radiate acoustic energy. The structure of concave stave has a great effect on its behavior. In this paper, the main parameters of concave stave are discussed, especially the effect of radius on flextensional transducer. Both concave stave and transducer are analyzed through finite element method, including mechanical transformation behavior of concave stave and performances of flextensional transducer. On the basis of finite element design, five prototypes employing concave staves with different radii are manufactured and measured. The simulations and tests reveal that concave stave can affect performances of flextensional transducer. A larger radius of concave stave will result in a greater amplification of vibration and a lower resonance frequency of transducer. This can be a feasible way to optimize the resonance frequency or source level of flextensional transducer through adjusting the radius of concave stave in a small range. According to the electrical and acoustical tests, our Class I barrel-stave flextensional transducer is capable of being used as underwater low-frequency small-size projector.

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“…Broadband is always desirable for designing acoustic transducers, so many researchers aim to improve the performance by optimizing the structure of acoustic transducers [7][8][9], especially the FTs [10][11][12]. In the optimization process, several structural parameters usually need to be determined, such as the axial ratio, shell height, and shell thickness [13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Design of low-frequency broadband flextensional transducers based on combined particle swarm optimization and finite element method

Zheng¹,

Li²,

Wang³

2021

Smart Mater. Struct.

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For designing underwater acoustic transducers, it is usually very difficult and time-consuming to determine multiple parameters simultaneously. Therefore, a novel design method that combines the particle swarm optimization (PSO) and finite element method (FEM) is proposed for low-frequency broadband flextensional transducers (FTs). This method can optimize multiple structural dimensions simultaneously and maximize the bandwidth performance of FTs efficiently. The validity of the PSO-FEM approach was verified by the optimization design and experiments of a class IV FT. Compared with previously reported design methods of FTs, this method is more efficient and avoids tedious operations. This work also provides a powerful and handy tool for the design of other underwater acoustic transducers.

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Analysis and design of low frequency and high power flextensional transducer with double-grooves

Cited by 7 publications

References 15 publications

Research and Fabrication of Broadband Ring Flextensional Underwater Transducer

Research and Fabrication of Broadband Ring Flextensional Underwater Transducer

Effect of Concave Stave on Class I Barrel-Stave Flextensional Transducer

Design of low-frequency broadband flextensional transducers based on combined particle swarm optimization and finite element method

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