- 유도초음파를 이용한 대구경 배관 적용에 관한 연구
- ㆍ 저자명
- 박상기,이영호,Park. S.K.,Lee. Y.H.
- ㆍ 간행물명
- 한국동력기계공학회지
- ㆍ 권/호정보
- 2008년|12권 1호|pp.58-65 (8 pages)
- ㆍ 발행정보
- 한국동력기계공학회
- ㆍ 파일정보
- 정기간행물| PDF텍스트
- ㆍ 주제분야
- 기타
A method to test thin-walled tubes by guided ultrasonic wave is reported. The principle is that applicate two types of axially symmetric ultrasonic tube modes and "longitudinal" modes with particle displacement, which is coupled in axial and radial directions for transverse failures and torsional modes, oscillating in the circumferential direction only, for longitudinal failures. Both types of modes propagate along the tube in the axial direction. Therefore, a pulse-echo technique is possible. The pulses are excited and received at one end of the tube without contact electro-dynamic transducers. As soon as the tubes is put into a transducer coil at one end, the test of the whole tube can be accomplished in a few milliseconds. It is not necessary to rotate and transport the tubes during the test.