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Validation of the Small Boundary Displacement Model of Fluid-Structure Coupling for Predicting Fluid-Elastic Lock-In

[+] Author Affiliations
David J. Manko, M. M. Sussman

Bechtel Bettis, Inc., West Mifflin, PA

Paper No. PVP2005-71570, pp. 611-617; 7 pages
doi:10.1115/PVP2005-71570
From:
  • ASME 2005 Pressure Vessels and Piping Conference
  • Volume 4: Fluid Structure Interaction
  • Denver, Colorado, USA, July 17–21, 2005
  • Conference Sponsors: Pressure Vessels and Piping Division
  • ISBN: 0-7918-4189-8 | eISBN: 0-7918-3763-7
  • Copyright © 2005 by ASME

abstract

This paper describes the validation of the S mall B oundary D isplacement M odel (SBDM) of fluid-structure coupling for predicting fluid-elastic lock-in response of a D-shaped cylinder in crossflow. This coupling model extends structural small displacement theory to fluid-structure interfaces, eliminating the need for temporally changing meshes when structural motion is small compared with problem dimensions. The SBDM algorithm accurately predicts the range and characteristics of lock-in behavior when compared to an independent two-dimensional numerical solution. Further validation of the SBDM simulations is provided by comparisons to fluid-only solutions at the limits of lock-in where the cylinder boundary is forced to oscillate at the same amplitudes as the corresponding coupled simulations. The SBDM predicted fluid-elastic response exceeds the 20 dB limit commonly used for experimentally identifying lock-in behavior.

Copyright © 2005 by ASME

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