Random Vibration of a Cylindrical Structure in a Pipe Located Just Downstream of a Valve. 1st Report. Understanding of Phenomenon.

国彦, 石原; 誠, 青木

doi:10.1299/kikaic.68.2249

Cited by 2 publications

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“…Ishihara and Aoki studied the random vibration of the thermo-well in the past (7) . Where the fluctuating velocity just at downstream of a valve set in a pipe was measured to examine the characteristic of flow turbulence.…”

Section: Ground Of Random Vibration and Its Considerationmentioning

confidence: 99%

Flow Induced Vibration of Shell & Tube Type Heat Exchanger (1st Report, Understanding of Phenomena)

Ishihara

2007

JEE

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This paper describes the phenomenon of flow-induced vibration in a shell & tube type heat exchanger. This type heat exchanger has often been used in the LPG gas carrier ship and has sometimes caused a fretting and finally comes to a fatigue failure. In flow-induced vibration, there are vortex-induced vibrations, fluid elastic instability and buffeting. Experiments are carried out by use of an actual heat exchanger in order to clarify the cause of tube vibration. The vibration of a lot of tubes is measured for various flow rates and the natural frequency and its damping ratio are also measured. As a result, the cause of the vibration of tubes is not the fluid elastic instability and the vortex-induced vibration but the buffeting due to the turbulence of upstream flow. The main reason is that these tubes are supported by many baffle plates with clearance and then the vibration system becomes the nonlinear.

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Section: Ground Of Random Vibration and Its Considerationmentioning

confidence: 99%

Flow Induced Vibration of Shell & Tube Type Heat Exchanger (1st Report, Understanding of Phenomena)

Ishihara

2007

JEE

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Study on Influence of Tube Arrays on Fluid Elastic Instability(Mechanical Systems)

石原

北山²

2009

Trans.JSME(C)

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The t匸1be bank is used in a boiler ， a heat exchanger and a stealll generator ． These tubes sometimes vibrate v ［｛ )1cntly and corne Lo the faしigue failure due t〔) the flow induced vibratiens which are caused by the cross flow． This phenomenon is that the large vibratioll arises at the critical velucity and it is caHed fiuid elastic instability ． However the innuence c)f tube arrays orl fluideIas 〔 ic instability has not been clarified yet ．上 n this paper， thc influence ' 〕f tube arrays on fluid elastic instability is examined by experiments ． As a result ， it is clarified that the tubc vibra し ions becomc Iarge as T 〆 D increases alld LD decreases ， and the tube vibratiolis strongly depend on し he dynamic characteristics ( ，f tubes their selvcs such as naturaL frequencics and damping ．

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Random Vibration of a Cylindrical Structure in a Pipe Located Just Downstream of a Valve. 1st Report. Understanding of Phenomenon.

Cited by 2 publications

References 0 publications

Flow Induced Vibration of Shell & Tube Type Heat Exchanger (1st Report, Understanding of Phenomena)

Flow Induced Vibration of Shell & Tube Type Heat Exchanger (1st Report, Understanding of Phenomena)

Study on Influence of Tube Arrays on Fluid Elastic Instability(Mechanical Systems)

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