Materials Transactions Online

Materials Transactions, Vol.53 No.04 (2012) pp.631-635
© 2012 The Japanese Society for Non-Destructive Inspection

Investigation of the Sound Field of Phased Array Using the Photoelastic Visualization Technique and the Accurate FEM

Sho Washimori, Tsuyoshi Mihara and Hatsuzo Tashiro

Mechanical and Intellectual Systems Engineering, University of Toyama, Toyama 930-8555, Japan

In this study, we tried to obtain an accurate ultrasonic sound field of the commercial phased array system. For this purpose, the experimental photoelastic ultrasonic visualization system was improved to evaluate a phased array system and the analytical special large-scale finite element method (FEM) code for ultrasonic transmission was applied.

As the results, an actual sound field of phased array system was much more complicate than that of the conventional industrial assumption based on a simple superposition. One of the causes of the difference might be the accuracy of the directivity for each element in the array transducer. Thus, the combination of photoelastic visualization method and FEM analysis was useful for the accurate sound field investigation of the phased array measurement.

(Received 2009/11/10; Accepted 2011/10/29; Published 2012/03/25)

Keywords: sound field, phased array, photoelastic visualization, finite element method, directivity

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