Shear horizontal piezoelectric fiber patch transducers (SH-PFP) for guided elastic wave applications
Shear horizontal piezoelectric fiber patch transducers (SH-PFP) for guided elastic wave applications
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DOI：
10.1016/j.ndteint.2016.04.001
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发表时间：
2016-09-01
影响因子：
4.2
通讯作者：
Schubert, Frank
中科院分区：
文献类型：
--
作者：
Koehler, Bernd;Gaul, Tobias;Schubert, Frank
提出了一种用于选择性激发水平极化剪切波的新型轻质压电换能器。基于压电纤维的换能器是柔性的，即显示结构一致性。该新方法允许通过具有双层交叉纤维布置的换能器引入显著的表面牵引力，而不需要重的地震质量。换能器的工作原理进行了解释和性能的第一个传感器版本是由激光测振测量发射到板的波证明。相同布置的数值建模显示出与主要特征的测量几乎完美的一致性，而一些细节的差异有助于理解如何改进第一个换能器版本。该换能器根据其纵横比表现出相当高的方向性和很强的模式选择性。(C)2016爱思唯尔有限公司版权所有
A new type of a lightweight piezoelectric transducer is proposed for selective excitation of horizontal polarized shear (SH) waves. Based on piezoelectric fibers the transducers are flexible, i.e. show structure conformity. The novel approach allows to introduce significant surface tractions by a transducer with double layer crossed fiber arrangement without the need of heavy seismic masses. The transducer operating principles are explained and the performance of a first transducer version is demonstrated by laser vibrometric measuring of the waves emitted into a plate. Numerical modeling of the identical arrangement shows nearly perfect agreement with measurements for the main features while differences in some details helps to understand how the first transducer version can be improved. The transducer exhibits, depending on its aspect ratio, a rather high directivity and a strong mode selectivity. (C) 2016 Elsevier Ltd. All rights reserved.