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A Study on the Characteristics of the Excited Vibration Signals in a Thermosonic Test  

Kang, Bu-Byoung (Super-Speed Train Research Department, Korea Railroad Research Institute)
Publication Information
Journal of the Korean Society for Nondestructive Testing / v.31, no.2, 2011 , pp. 118-126 More about this Journal
Abstract
The characteristics of the responses obtained in thermosonic tests are investigated in this study to improve the performance of a thermosonic test system. Thermosonic tests are conducted with an acoustic horn with high power capability to investigate the characteristics of the vibration produced in turbine blades with complex geometry. The influences of the excitation signal that is input to the horn and the coupling methods between a clamp and the acoustic horn on the characteristics of the vibration excited in a component are presented. As a result, an excitation method with a fast narrow band chirp test (sweep test) and a stud coupling is proposed as an excitation method for thermosonic testing. This method can be applied to different types of turbine blades and also to other components.
Keywords
Thermosonics; Acoustic Horn; Turbine Blade Inspection; Excitation Signal; Chirp Test;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
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