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Spectral Element Vibration Analysis of the Pipeline Conveying Internal Flow

내부유동을 갖는 파이프 진동의 스펙트럴요소해석

  • 오혁진 (인하대학교 기계공학과) ;
  • 강관호 (인하대학교 기계공학과) ;
  • 이우식 (인하대학교 기계공학과)
  • Published : 2003.02.01

Abstract

It is of often important to accurately predict the flow-induced vibration or dynamic instability of a pipeline conveying internal high speed flow in advance, which requires a very accurate solution method. In this study, first the dynamic equations for the axial and transverse vibrations of a pipeline are reduced from a set of pipe-dynamic equations derived in the previous study and then the spectral element model is formulated. The accuracy of the spectral element method (SEM) is then verified by comparing its results with the results obtained by finite element method (FEM). It is shown that the present spectral element model provides very accurate solutions by using an extremely small number of degrees-of-freedom when compared with FEM. The dynamics of a sample pipeline is investigated with varying the axial tension and the speed of internal flow.

Keywords

Pipe;Vibration;Internal Flow;Spectral Element Method;Critical Flow Velocity

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