A computational time domain approach to fluidelastic instability for nonlinear tube dynamics

Book · Sun Dec 01 04:00:00 EST 1996

OSTI ID:403403

Sauve, R G ^[1]

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1. Ontario Hydro Technologies, Toronto, Ontario (Canada)

Although methods are available for the assessment of flow induced vibration in process equipment tube arrays such as nuclear steam generators, they are generally limited to linear vibration in single phase flow regimes. Specifically, work on forcing functions for nonlinear vibration has been relatively successful in modelling turbulent two phase flows using an empirical approach, however, work on the mechanism of fluidelastic instability (FEI) has been slow. One reason for this, is the fact that nonlinear analysis relies on time domain solutions while fluidelastic instability using empirical approaches merely give threshold flow velocities for unstable behavior. In this paper, the formulation and implementation of a time domain forcing function equivalent to Connors` equation for FEI is presented. Results indicate that the formulation provides results consistent with Connors` equation.

• OSTI ID: 403403
• Report Number(s): CONF-960706--; ISBN 0-7918-1775-X
• Country of Publication: United States
• Language: English

Related Subjects

22 GENERAL STUDIES OF NUCLEAR REACTORS
CALCULATION METHODS
FLUID-STRUCTURE INTERACTIONS
MECHANICAL VIBRATIONS
NONLINEAR PROBLEMS
NUCLEAR POWER PLANTS
STEAM GENERATORS
THEORETICAL DATA