조화유동이 흐르는 파이프의 감쇠를 포함한 매개변수공진 해석 Damping Effects on Parametric Resonances of a Straight Pipe with Pulsatile Flow
한국기계기술학회지
(韓國機械技術學會誌)
제19권 제5호
(2017.10)
pp.661-669
pp.661-669
한국기계기술학회
(Korean Society of Mechanical Technology)
초록
The damping effects on stabilities of a simply supported pipe conveying fluid is investigated using the complexification-averaging method. The flow is assumed to vary harmonically about a mean speed. Unstable conditions of a piping system included with the viscous and material damping are analytically obtained for primary, secondary and combination parametric resonances. The primary and secondary resonances occur when the frequency of flow fluctuation is close to one and two times the natural frequency. And when this frequency is close to the sum of any two natural frequencies, combination resonances occur. The effects of damping parameters on the regions of three parametric resonances are discussed.
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