Local and global instability of fluid-conveying cantilever pipes

Abstract : The flutter of a cantilever fluid-conveying pipe is one of the most generic problems of flow-induced vibrations. In its simplest model, linear stability is lost as the flow velocity is increased, at a threshold which depends on the mechanical parameters of the system. This is a global instability. An infinite pipe modeled with the same local equations experience local instability as soon as the fluid is put into motion. When an elastic foundation is present, cases of local stability with global instability, or, conversely, local instability with global stability are found. The purpose of this paper is to address the question of compatibility between local and global approaches. More specifically, when an elastic foundation is present, we give a criterion on traveling waves to allow a global instability to develop.
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Communication dans un congrès
Flow-induced Vibration, Jun 2000, lucerne, Switzerland. Balkema Publishers, pp.349-354, 2000
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https://hal-polytechnique.archives-ouvertes.fr/hal-01026061
Contributeur : Denis Roura <>
Soumis le : samedi 19 juillet 2014 - 17:07:06
Dernière modification le : jeudi 10 mai 2018 - 02:01:52

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  • HAL Id : hal-01026061, version 1

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Olivier Doaré, Emmanuel De Langre. Local and global instability of fluid-conveying cantilever pipes. Flow-induced Vibration, Jun 2000, lucerne, Switzerland. Balkema Publishers, pp.349-354, 2000. 〈hal-01026061〉

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