Design of Ultrasonic Transducer for Secondary Wave Generations with High Directivity

IF 0.8 4区工程技术 Q4 ACOUSTICS

International Journal of Acoustics and Vibration Pub Date : 2019-12-31 DOI:10.20855/ijav.2019.24.41460

Chol-Hak Kim, Myong-jin Kim, Chol-Su Ri

引用次数: 0

Abstract

In this paper, we described a method of designing ultrasonic transducer which simultaneously radiates two finiteamplitude ultrasonic waves to produce the secondary waves with high directivity. For nonlinear effects, it is necessary that the frequencies of two primary waves are coincident with natural frequencies of the ultrasonic transducer. The main problem here is to predict the resonance frequencies of the first mode as well as higher modes. While the first resonance frequency of the transducer can be estimated easily, it is not trivial to do higher ones. When the length of transducer is much greater than its diameter, this problem is reduced to one-dimensional and higher mode frequencies are nothing but multiples of the first mode frequency. However, such a case is seldom encountered. Using the transfer matrix method, we obtained the resonance frequencies of the transducer analytically and compared these with numerical results from the simulation. The theoretical and simulation results are in good agreement with the difference of 3–6kHz.

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高指向性二次波发生器超声换能器的设计

本文描述了一种设计超声换能器的方法，该换能器同时辐射两个有限束分裂的超声波，以产生具有高指向性的二次波。对于非线性效应，两个初级波的频率必须与超声换能器的固有频率一致。这里的主要问题是预测第一模式以及更高模式的谐振频率。虽然可以容易地估计换能器的第一谐振频率，但进行更高的谐振频率并非易事。当换能器的长度远大于其直径时，这个问题被简化为一维，并且更高的模式频率只不过是第一模式频率的倍数。然而，这种情况很少发生。使用传递矩阵方法，我们解析地获得了换能器的谐振频率，并将其与模拟的数值结果进行了比较。理论和仿真结果与3–6kHz的差异非常一致。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

International Journal of Acoustics and Vibration ACOUSTICS-ENGINEERING, MECHANICAL

CiteScore

1.60

自引率

10.00%

发文量

审稿时长

12 months

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