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Forced Vibration Modeling of Rail Considering Shear Deformation and Moving Magnetic Load

전단변형과 시간변화 이동자기력을 고려한 레일의 강제진동모델링

  • 김준수 (한양대학교 기계공학부) ;
  • 김성종 (한양대학교 기계공학부) ;
  • 이혁 (한양대학교 기계공학부) ;
  • 하성규 (한양대학교 기계공학부) ;
  • 이영현 (국방과학연구소)
  • Received : 2013.06.07
  • Accepted : 2013.09.27
  • Published : 2013.12.01

Abstract

A forced vibration model of a rail system was established using the Timoshenko beam theory to determine the dynamic response of a rail under time-varying load considering the damping effect and stiffness of the elastic foundation. By using a Fourier series and a numerical method, the critical velocity and dynamic response of the rail were obtained. The forced vibration model was verified by using FEM and Euler beam theory. The permanent deformation of the rail was predicted based on the forced vibration model. The permanent deformation and wear were observed through the experiment. Parametric studies were then conducted to investigate the effect of five design factors, i.e., rail cross-section shape, rail material density, rail material stiffness, containment stiffness, and damping coefficient between rail and containment, on four performance indices of the rail, i.e., critical velocity, maximum deflection, maximum longitudinal stress, and maximum shear stress.

Keywords

Critical Velocity;Timoshenko Beam Theory;Euler Beam Theory;Beam On Elastic Foundation;Dynamic Response

Acknowledgement

Supported by : 국방과학연구소

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