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基于有限元模拟仿真技术,对不同厚度压电陶瓷的品质因子Q、表面总声压、振型进行分析.选取厚度为2.5 mm和5.0 mm的陶瓷片,制备不同叠堆结构的2-2型多层压电复合材料.通过测试电学性能及导纳曲线,研究叠堆模型对换能器的阻抗(|Z|)、谐振频率(fs)和带宽的影响,并首次系统比较阶梯型与交替叠堆结构对多模态耦合的影响.结果表明,不同厚度压电陶瓷阶梯型叠堆更易引起多模态耦合,而交替叠堆多模耦合效果不明显.此外,树脂层厚度太大会形成阻尼,引起谐振频率(fs)降低,阻抗(|Z|)增大.适当厚度的陶瓷片和环氧树脂胶阶梯型叠堆复合,可以提高叠堆换能器的谐振频率,并保持带宽不衰减.当2.50 mm和5.00 mm厚的陶瓷片阶梯型叠堆复合,树脂层厚度为0.15 mm时,换能器的谐振频率提升至446.24 kHz,带宽基本保持不变为7.27 kHz.这为高频宽带水声换能器设计与制作提供一种参考.
Abstract：Based on finite element simulation technology, the quality factor Q, total surface sound pressure and vibration mode of piezoelectric ceramics with different thicknesses were analyzed. Ceramic sheets with thicknesses of 2.50 mm and 5.00 mm were selected to fabricate 2-2 type multilayer piezoelectric composite with different stack structures. By testing electrical performance and admittance curve, the impact of the stack model on the impedance(, resonant frequency(fs) and bandwidth of the transducer was studied. The impact of stepped and alternating stacked structures on multi-modal coupling was compared systematically for the first time. The results showed that stepped stacks of piezoelectric ceramics with different thicknesses were more likely to cause multi-mode coupling, while the multi-mode coupling effect of alternating stacks was not obvious. In addition, an excessively thick resin layer introduces damping, leading to a decrease in resonant frequency(fs) and an increase in impedance(. The ladder-type stacking of ceramic sheets with appropriate thickness and epoxy resin glue would increase the resonant frequency of the stacked transducer and maintain the bandwidth without attenuation. When 2.50 mm and 5.00 mm thick ceramic sheets were stacked in a stepped manner and the resin layer thickness was 0.15 mm, the resonant frequency of the transducer increased to 446.24 kHz, and the bandwidth remained basically unchanged at 7.27 kHz. This provides a reference for the design and fabrication of high-frequency and broadband underwater acoustic transducers.
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基本信息:
中图分类号:TN384;TB565.1
引用信息:
[1]张军,罗福康,王祥达.一种高频宽带压电叠堆换能器元器件研究[J].西南民族大学学报(自然科学版)().
基金信息:
广东省基础与应用基础研究基金资助项目（181003）; 国家重点研发计划基金资助项目（2021YFB3702002）
2026-05-11
2026-05-11
2026-05-11