Journal of the Korea Society for Simulation (한국시뮬레이션학회논문지)

The Korea Society for Simulation (한국시뮬레이션학회)
권호 표지

A Simulation for the Free Vibration of Pipe Systems Considering Initial Tension

초기 인장력을 고려한 파이프계의 자유진동 시뮬레이션

  • Published : 1998.12.01
Download PDF
⟨ Previous Next ⟩

Abstract

Using finite elements, a simulation is prformed for the pipe systems to investigate free vibrational characteristics, that is natural frequencies, considering the intial tension due to the velocity and the pressure of the inside fluid flow. To confirm the program developed in this study, the results are compared with the results of commercial software ANSYS. When the initial tension is neglected in curved pipes, the natural frequencies are reduced as flow velocity increases, and the rapid decreases of the natural frequencies took place. However, when the initial tension is taken into account, the natural frequencies are not changed with the change of the flow velocity. In free vibrational simulation of pipe systems, it is necessary to calculate the initial state force due to the velocity and the pressure of the fluid flow from the equilibrium first, then the force should be included in the equation of motion of the systems to get more accurate natural frequencies.

Keywords

References

  1. 석사학위논문, 인하대학교 내부유동을 포함한 3차원 굴곡된 파이프의 진동해석 박용석
  2. 석사학위논문, 경희대학교 유한요소법을 이용한 연료분사 파이프의 자유진동 해석에 관한 연구 이경구
  3. 박사학위논문, 경희대학교 전달행렬법에 의한 파이프계의 유체유발진동 및 동적거동에 관한 연구 이동명
  4. Journal of Applied Mechanics, Trans. ASME Bending Vibrations of a Pipe Line Containing Folwing Fluid Ashley, H.;Haviland, G.
  5. Journal of Acoust. Soc. Am v.51 no.1 Vibration and Stability of a Uniformly Curved Tube Conveying Fluid Chen, S.S.
  6. Journal of Applied Mechanics v.40 Out of Plane Vibration and Stability of Curved Tube Conveying Fluid Chen, S.S.
  7. Journal of Pressure Vessel Technology, Trans. ASME v.108 Dynamic Analysis of Fluid Filled Piping Systems using Finite Element Technics Everstin, G.C.
  8. Modern Problems of Vibrations and Resistance in Engineering Construction Goldenblatt, I.I.
  9. Journal of Applied Mechanics v.41 The Effect of Initial Forces on the Hydroelastic Vibration and Stability of planar Curved Tubes Hill, J.L.
  10. Journal of Sound and Vibration v.93 no.2 Vibration Analysis of Straight and Curved Tubes Conveying Fluid by Means of Straight Beam Finite Elements Kohli, A.K.;Nakra, B.C.
  11. A Treatise on the Mathematical Theory of Elasticity Love, A.E.H.
  12. Journal of Mechanical Engineering Division v.97 no.EM3 Nonconservative Stability by Finite Element Mote, C.D.
  13. Introduction to Finite Element Vibration Analysis Petyt, M.
  14. Journal of Applied Mechanics v.92 Vibration of Pipes Containing Flowing Fluids Stein, R.A.;Torriner, M.W.
  15. Journal of Sound and Vibration v.96 no.2 The Accoustic Simulation and Analysis of Compicated Reciprocation Compressor Piping System Part Ⅰ and Part Ⅱ Thomas, C.;Wilson, S.
  16. Journal of Applied Mechanics, Trans. ASME Hydroelastic Instability of Uniformly Curved Pipe-Fluid Systems Unny, T.E.;Martin, E.L.;Dubey, R.N.
  17. Journal of Applied Mechanics, Trans. ASME On the Dynamic Stability of Pipes Conveying Fluid Weaver, D.S.;Unny, T.E.