한국생산제조학회지 (Journal of the Korean Society of Manufacturing Technology Engineers)

  • 제23권3호
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  • Pages.223-229
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  • 2014
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  • 2508-5093(pISSN)
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  • 2508-5107(eISSN)
한국생산제조학회 (The Korean Society of Manufacturing Technology Engineers)
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단일 크랙을 갖는 외팔보의 진동특성

Vibration Characteristics of Cantilever Beam with a Crack

  • Kim, Jong-Do (Department of Mechanical Design, Kyungnam College of information & Technology) ;
  • Jo, Ji-Yun (Department of Mechanical and Automotive Engineering, Pukyong National University) ;
  • Yoon, Moon-Chul (Department of Mechanical and Automotive Engineering, Pukyong National University)
  • 투고 : 2014.03.07
  • 심사 : 2014.05.20
  • 발행 : 2014.06.15
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초록

In this paper, the natural frequency and damping ratio are analyzed with the acceleration signal of an Euler-Bernoulli beam using the impact hammer test. The results are presented according to crack depth and position using the recursive least squares method. The results are compared and investigated with FEM analysis of CATIA. Both methods agree well with each other regarding the natural mode characteristics. The captured acceleration can be used for the calculation of the natural frequency and damping ratio using time series methods that are based on the measured acceleration. Using these data, a recursive time series model with the acceleration signal was configured and the behaviors of the natural frequency and damping ratio were investigated and analyzed. Finally, the results can be used for the prediction of crack position and depth under different crack conditions for an Euler-Bernoulli beam.

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참고문헌

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