서지주요정보
회전체에서의 개폐 균열 검출을 위한 시나리오 시험 = A scenario test for detection of breathing crack in rotors
서명 / 저자 회전체에서의 개폐 균열 검출을 위한 시나리오 시험 = A scenario test for detection of breathing crack in rotors / 강성우.
발행사항 [대전 : 한국과학기술원, 2001].
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소장정보

등록번호

8011652

소장위치/청구기호

학술문화관(문화관) 보존서고

MME 01007

휴대폰 전송

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리뷰정보

초록정보

The complex modal testing method, which was primarily developed for rotor systems, has been proven that the directional frequency response estimates can be effectively used for identification of such system asymmetry as open crack. Unlike an open crack, a breathing crack may repeat opening and closing as the shaft rotates, requiring analysis of a time-varying nonlinear system. In this work, a two-staged scenario test for effective detection of breathing crack is proposed. In the first stage, an electromagnetic exciter is employed to properly generate a harmonic excitation synchronous to the shaft rotating frequency so that the synchronous excitation allows the breathing crack either completely open or closed during the shaft revolution. In the second stage, the shaft with the completely open or closed crack is modal-tested for estimation of the reverse directional frequency response functions which can indicate the status of crack. For the accurate detection of breathing crack, the initial bow and imbalance of system are identified and balanced by using the magnetic exciter in operation. Experimental results confirm that a breathing crack can be successfully detected by the scenario test, in spite of the presence of other asymmetric and anisotropic properties in the test rotor than a breathing crack.

서지기타정보

서지기타정보
청구기호 {MME 01007
형태사항 viii, [60] p. : 삽도 ; 26 cm
언어 한국어
일반주기 저자명의 영문표기 : Sung-Woo Kang
지도교수의 한글표기 : 이종원
지도교수의 영문표기 : Chong-Won Lee
학위논문 학위논문(석사) - 한국과학기술원 : 기계공학전공,
서지주기 참고문헌 : p. 58-60
주제 개폐 균열
개폐 균열 검출
시나리오 시험
균형잡기
회전체
breathing crack
detection of breathing crack
scenario test
balancing
rotors
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