Analysis of fluid-structure interaction in a frame pipe undergoing plastic deformations
- Ecole Centrale de Lyon (France). Laboratoire de Tribologie et Dynamique des Systemes
Water hammer pressure waves of sufficiently large magnitude can cause plastic flexural deformations in a frame pipe. In this study, the authors propose a modelization of this problem based on plane wave approximation for the fluid equations and approximation of the structure motion by a single-degree-of-freedom elastic-plastic oscillator. Direct analytical integration of elastic-plastic equations through pipe sections, then over the pipe length is performed in order to identify the oscillator parameters. Comparison of the global load-displacement relationship obtained with the finite element solution was considered and has shown good agreement. Fluid-structure coupling is achieved by assuming elbows to act like plane monopole sources, where localized jumps of fluid velocity occur and where net pressure forces are exerted on the structure. The authors have applied this method to analyze the fluid-structure interaction in this range of deformations. Energy exchange between the fluid and the structure and energy dissipation are quantified.
- OSTI ID:
- 124604
- Report Number(s):
- CONF-950740-; ISBN 0-7918-1345-2; TRN: IM9548%%194
- Resource Relation:
- Conference: Joint American Society of Mechanical Engineers (ASME)/Japan Society of Mechanical Engineers (JSME) pressure vessels and piping conference, Honolulu, HI (United States), 23-27 Jul 1995; Other Information: PBD: 1995; Related Information: Is Part Of Fluid sloshing and fluid-structure interaction 1995. PVP-Volume 314; Ma, D.C. [ed.] [Argonne National Lab., IL (United States)]; Tani, J. [ed.] [Tohoku Univ., Sendai (Japan). Inst. of Fluid Science]; Brochard, D. [ed.] [C.E.A. Centre d`Etudes de Saclay, Gif sur Yvette (France). Inst. National des Sciences et Techniques Nucleaires]; Fujita, K. [ed.]; PB: 178 p.
- Country of Publication:
- United States
- Language:
- English
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