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Parametric and Combination Resonances of at Straight Pipe with Pulsatile Flow

조화유동을 갖는 직선 파이프의 매개변수공진 해석

  • 홍성철 (한라대학교 기계자동차공학부)
  • Published : 2006.12.01

Abstract

The stabilities of a pinned-pinned straight pipe conveying fluid are investigated by complexification-averaging method. The flow is assumed to vary harmonically about a constant mean velocity. Instability conditions of a governing equation are analytically obtained about parametric primary, secondary and combination resonances. The resulted stability conditions show that instabilities exist when the frequency of flow fluctuation is close to one and two times the natural frequency or to the sum of any two natural frequencies. In case that the fluctuated flow frequency is close to the difference of two natural frequencies, instabilities does not exist.

Keywords

References

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