| 胡理情,林书玉.声子晶体结构在功率超声换能器中的应用*[J].,2021,40(3):323-328 |
| 声子晶体结构在功率超声换能器中的应用* |
| Application of phononic crystal structure in power ultrasonic transducer |
| 投稿时间：2020-08-10 修订日期：2021-04-28 |
| 中文摘要: |
| 本文提出了一种二维声子晶体结构模型,并将该模型应用于横向尺寸较大的功率超声换能器的前盖板中,避免了形成耦合振动对换能器的影响,从而优化了该类换能器的工作性能。首先设计了一种具有近周期性结构的圆柱形孔的前盖板,然后研究了声子晶体结构前盖板散射体的半径大小和高度对换能器共振频率以及前盖板带隙的影响。结果表明随着散射体半径和高度的增大,换能器的共振频率会随之发生改变,带隙范围也在发生变化,可以通过调节使换能器的共振频率处于声子晶体的带隙范围内,可以有效抑制换能器的横向振动。 |
| 英文摘要: |
| A two-dimensional phononic crystal structure model is proposed in this paper and applied in power ultrasonic transducer with large transverse dimensions, which avoids the influence of coupling vibration on the transducer and optimizes its performance.. Firstly, the front cover plate of cylindrical hole with near periodic structure is designed,then the influence of the radius and height of the scatterer on the resonant frequency and band gap of the phononic crystal structure is studied. The research shows that with the increase of the radius and height of the scatterer, the resonant frequency of the transducer will change, and the band gap range will also change. The resonant frequency of the transducer can be adjusted to be within the band range of the phonon crystal, which can effectively suppress the transverse vibration of the transducer. |
| DOI：10.11684/j.issn.1000-310X.2021.03.001 |
| 中文关键词: 二维声子晶体 超声换能器 前盖板 带隙 耦合振动 |
| 英文关键词: two-dimensional phononic ultrasonic transducer front cover plate band gap coupled vibration |
| 基金项目:国家自然科学基金项目（面上项目，重点项目，重大项目） |
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