Transactions of the Korean Society for Noise and Vibration Engineering (한국소음진동공학회논문집)

The Korean Society for Noise and Vibration Engineering (한국소음진동공학회)
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Influence of Serial Moving Masses on Dynamic Behavior of Simply Supported Beam with Crack

크랙을 가진 단순지지 보의 동특성에 미치는 이동질량의 영향

  • 윤한익 (동의대학교 기계정보산업공학부) ;
  • 김영수 (부산정보대학 기계자동차계열) ;
  • 손인수 (동의대학교 대학원 기계공학과)
  • Published : 2003.07.01
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Abstract

An iterative modal analysis approach is developed to determine the effect of transverse open cracks on the dynamic behavior of simply supported Euler-Bernoulli beams with the moving masses. The influences of the velocities of moving masses, the distance between the moving masses and a crack have been studied on the dynamic behavior of a simply supported beam system by numerical method. The Presence of crack results In large deflection of beam. The crack section is represented by a local flexibility matrix connecting two undamaged beam segments i.e. the crack is modelled as a rotational spring. This flexibility matrix defines the relationship between the displacements and forces across the crack section and is derived by applying fundamental fracture mechanics theory. Totally, as the velocity of the moving masses and the distance between the moving masses are increased, the mid-span deflection of simply supported beam with the crack is decreased.

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References

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