Numerical Modelling and Experimental Verification of Interdigital Transducers for Lamb Wave Generation
Numerical Modelling and Experimental Verification of Interdigital Transducers for Lamb Wave Generation
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DOI：
10.4028/www.scientific.net/ssp.220-221.843
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发表时间：
2015-01
期刊：
影响因子：
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通讯作者：
M. Manka;A. Martowicz;M. Rosiek;Ł. Ambroziński;T. Uhl
中科院分区：
文献类型：
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作者：
M. Manka;A. Martowicz;M. Rosiek;Ł. Ambroziński;T. Uhl
最近，人们观察到导波（GW）在结构健康监测（SHM）中应用的深入研究活动。叉指换能器 (IDT) 是用于生成 GW 的换能器类型之一。此类换能器的主要优点包括其产生定向波和模式选择波的能力。 IDT 的参数必须针对激发波长进行调整。一些几何参数以及用于制造换能器的材料的特性可以使用众所周知的分析关系来定义[1]。然而，为了准确确定IDT的参数，需要大量的模拟及其实验验证[2]。本文提出了一种新颖、省时的方法来构建复杂形状传感器的虚拟原型。所提出的程序包括以下四个步骤：（1）基于分析关系设计换能器，（2）使用定制的、计算高效的筛选测试代码对设计的换能器进行近似数值模拟，（3）采用多物理场有限元法（FEM）对开发的IDT设计进行详细的数值测试，以及（4）实验测试。
Recently, intensive research activity in the application of guided waves (GWs) for structural health monitoring (SHM) has been observed. Interdigital Transducer (IDT) is one of the types of transducers used for generating GWs. The main advantages of such transducers include their ability in generating directional and mode-selective waves. The parameters of IDTs have to be adjusted for the excited wavelength. Some geometric parameters as well as the properties of materials used for manufacturing transducers may be defined using widely known analytical relationships [1]. However, in order to accurately determine the parameters of the IDT, numerous simulations and their experimental verification are required [2]. The paper presents a novel, time efficient approach to the virtual prototyping of complex shaped transducers. The proposed procedure consists of the following four steps: (1) designing a transducer based on analytical relations, (2) approximate numerical simulations of designed transducers with a custom-made, computationally efficient code for screening tests, (3) detailed numerical tests employing the multiphysics Finite Element Method (FEM) for the developed IDT design and (4) experimental tests.