Journal of the Korean Society of Manufacturing Process Engineers (한국기계가공학회지)

The Korean Society of Manufacturing Process Engineers (한국기계가공학회)
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Study on Method of Crack Detection of L-beams with Coupled Vibration

연성진동하는 L형 단면 보의 크랙 검출 방법에 대한 연구

  • 손인수 (동의대학교 기계공학과) ;
  • 조정래 (한국폴리텍 VI대학 달성캠퍼스 자동차과) ;
  • 안성진 (대한상공회의소 부산인력개발원)
  • Received : 2010.12.26
  • Accepted : 2010.12.02
  • Published : 2010.12.31
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Abstract

This paper aims to investigate the natural frequency of a cracked cantilever L-beams with a coupled bending and torsional vibrations. In addition, a theoretical method for detection of the crack position and size in a cantilever L-beams is presented based on natural frequencies. Based on the Euler-Bernoulli beam theory, the equation of motion is derived by using extended Hamilton's Principle. The dynamic transfer matrix method is used for calculation of a exact natural frequencies of L-beams. In order to detect the crack of L-beams, the effect of spring coefficients for bending moment and torsional force is included. In this study, the differences between the actual data and predicted positions and sizes of crack are less than 0.5% and 6.7% respectively.

Keywords

References

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