预应力层对球形换能器声辐射性能的影响

IF 2.1 3区 物理与天体物理 Q3 PHYSICS, APPLIED
Xiaofang Zhang, Xiujuan Lin, Rui Guo, C. Yang, Hui Zhao, Mingyu Zhang, Yan Wang, Xin Cheng, Shi-feng Huang
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引用次数: 1

摘要

为了提高球形换能器的声辐射性能,在换能器内部通过光纤缠绕形成预应力层。分别从径向预应力([公式:见文])和声阻抗的影响两方面研究了预应力层对换能器的影响。首先,用预应力层的薄壳近似建立[公式:见文]的理论估计[公式:见文]。然后,测量声阻抗,评估声能在预应力层内的传输效率。在此基础上,通过有限元分析分析了[公式:见文]对换能器声辐射性能的理想影响。最后,制作了四个球形换能器并进行了测试,以研究其实际性能与预应力层的关系。结果表明,随着[公式:见文][公式:见文]的增大,预应力层的声阻抗增大,减轻了压电陶瓷与水之间巨大的阻抗失配,同时声能衰减增大,最大发射电压响应(TVR[公式:见文])峰值为1.18 MPa。最大驱动电压随[公式:见文][公式:见文]而增加,导致最大发射声级(SL[公式:见文])稳定增长,在3.44 MPa下显著上升3.9 dB[公式:见文][公式:见文]。这是一个强有力的可信度,预应力层可以提高球形换能器的声辐射性能。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Influence of the prestressed layer on spherical transducer in sound radiation performance
To improve the acoustic radiation performance of the spherical transducer, a prestressed layer is formed in the transducer through fiber winding. The influence of the prestressed layer on the transducer is studied from the effects of the radial prestress ([Formula: see text][Formula: see text]) and acoustic impedance, respectively. First, a theoretical estimation of [Formula: see text][Formula: see text] is established with a thin shell approximation of the prestressed layer. Then, the acoustic impedance is measured to evaluate the efficiency of sound energy transmission within the prestressed layer. Further, the ideal effects of [Formula: see text][Formula: see text] on the sound radiation performances of the transducer are analyzed through finite element analysis (FEA). Finally, four spherical transducers are fabricated and tested to investigate their dependence of actual properties on the prestressed layer. The results show that with the growth of [Formula: see text][Formula: see text], the acoustic impedance of the prestressed layer grows, mitigating the enormous impedance mismatch between the piezoelectric ceramic and water, while increasing attenuation of the acoustic energy, resulting in a peak value of the maximum transmitting voltage response (TVR[Formula: see text]) at 1.18 MPa. The maximum drive voltage increases with [Formula: see text][Formula: see text], leading to a steady growth of the maximum transmitting sound level (SL[Formula: see text]), with a noticeable ascend of 3.9 dB at a 3.44 MPa [Formula: see text][Formula: see text]. This is a strong credibility that the prestressed layer could improve the sound radiation performance of the spherical transducer.
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来源期刊
CiteScore
3.80
自引率
6.50%
发文量
36
审稿时长
18 weeks
期刊介绍: The Journal of Advanced Dielectrics is an international peer-reviewed journal for original contributions on the understanding and applications of dielectrics in modern electronic devices and systems. The journal seeks to provide an interdisciplinary forum for the rapid communication of novel research of high quality in, but not limited to, the following topics: Fundamentals of dielectrics (ab initio or first-principles calculations, density functional theory, phenomenological approaches). Polarization and related phenomena (spontaneous polarization, domain structure, polarization reversal). Dielectric relaxation (universal relaxation law, relaxor ferroelectrics, giant permittivity, flexoelectric effect). Ferroelectric materials and devices (single crystals and ceramics). Thin/thick films and devices (ferroelectric memory devices, capacitors). Piezoelectric materials and applications (lead-based piezo-ceramics and crystals, lead-free piezoelectrics). Pyroelectric materials and devices Multiferroics (single phase multiferroics, composite ferromagnetic ferroelectric materials). Electrooptic and photonic materials. Energy harvesting and storage materials (polymer, composite, super-capacitor). Phase transitions and structural characterizations. Microwave and milimeterwave dielectrics. Nanostructure, size effects and characterizations. Engineering dielectrics for high voltage applications (insulation, electrical breakdown). Modeling (microstructure evolution and microstructure-property relationships, multiscale modeling of dielectrics).
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