한국정밀공학회지 (Journal of the Korean Society for Precision Engineering)

  • 제27권6호
  • /
  • Pages.47-54
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  • 2010
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  • 1225-9071(pISSN)
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  • 2287-8769(eISSN)
한국정밀공학회 (Korean Society for Precision Engineering)
권호 표지

양단 고정보의 크랙 검출에 대한 실험적 연구

Experimental Study on Crack Detection of Clamped-clamped Beams

  • 손인수 (동의대학교 기계공학과) ;
  • 안성진 (대한상공회의소 부산인력개발원 설비보전진단과) ;
  • 윤한익 (동의대학교 기계공학과)
  • Son, In-Soo (Department of mechanical Engineering, Dong-eui Univ.) ;
  • Ahn, Sung-Jin (Department of mechanical Maintenance, Busan HRD, KCCI) ;
  • Yoon, Han-Ik (Department of mechanical Engineering, Dong-eui Univ.)
  • 투고 : 2009.11.05
  • 심사 : 2010.04.12
  • 발행 : 2010.06.01
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초록

In this paper, the purpose is to study a method for detection of crack in clamped-clamped beams using the vibration characteristics. The natural frequency of beam is obtained by FEM and experiment. The governing differential equations of a Timoshenko beam are derived via Hamilton's principle. The two coupled governing differential equations are reduced to one fourth order ordinary differential equation in terms of the flexural displacement. The crack is assumed to be in the first mode of fracture and to be always opened during the vibrations. The differences between the actual and predicted crack positions and sizes are less than 9.8% and 28%, respectively.

키워드

참고문헌

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