Vortex-Induced Vibrations of a Pipe Subjected to Unsynchronized Support Motions

In this study, the nonlinear dynamics of a pipe subjected to vortex-induced vibrations and unsynchronized support motions are investigated, considering the phase difference of support motions at two ends of pipe. We first use a wake oscillator model based on the van der Pol equation to describe the vortex-induced force, and validate the induced vibration amplitude of structure against the experimental data. Then, a nonlinear theoretical model representing the dynamic responses of the pipe system at different locations is constructed based on the Hamilton principle and Galerkin discretization. The resulting ordinary differential equations are numerically solved providing multi-mode approximations to the cross-flow amplitude and the lift coefficient. It is shown that the cross-flow amplitude of the pipe around the first lock-in region is significantly affected by the support motions, resulting in a greatly suppressed or increased vibration amplitude of the pipe. Moreover, the bandwidth of support excitation frequency between minimum and maximum vibration amplitudes changes with the phase difference, owing to the transition between aperiodic and periodic responses of pipe. In addition, the effect of geometric nonlinearity on the responses of pipe with support motions is also discussed.

• Record URL:
  • https://doi.org/10.1007/s00773-017-0526-y
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/09484280
• Supplemental Notes:
  • Copyright © 2018, JASNAOE. The contents of this paper reflect the views of the authors and do not necessarily reflect the official views or policies of the Transportation Research Board or the National Academy of Sciences.
• Authors:
  • He, Fang
  • Dai, Huliang
  • Wang, Lin
• Publication Date: 2018-12

Language

• English

Media Info

• Media Type: Web
• Features: References;
• Pagination: pp 978-990
• Serial:
  • Journal of Marine Science and Technology
  • Volume: 23
  • Issue Number: 4
  • Publisher: Springer Japan
  • ISSN: 0948-4280
  • EISSN: 1437-8213
  • Serial URL: http://link.springer.com/journal/773

Subject/Index Terms

• TRT Terms: Nonlinear systems; Pipe; Structural supports; Vibration; Vortices
• Subject Areas: Hydraulics and Hydrology; Marine Transportation; Pipelines; Vehicles and Equipment;

Filing Info

• Accession Number: 01691698
• Record Type: Publication
• Files: TRIS
• Created Date: Jan 28 2019 5:11PM