Vibration isolation - exploring the foundations

  • H.M. Williamson Hugh Williamson Associates, Ottawa, Canada
  • J.C.S. Lai Hugh Williamson Associates, Ottawa, Canada
  • J. Dai Hugh Williamson Associates, Ottawa, Canada
  • C. Norwood Hugh Williamson Associates, Ottawa, Canada
  • Y. Li Hugh Williamson Associates, Ottawa, Canada
Keywords: Mathematical models, Supports, Point mobility, Surface mobility

Abstract

The interaction between a large isolator and a supporting structure is examined. Large area contact can result in a mobility which is significantly different from measured or predicted point mobility. Surface mobility measurements can help avoid situations where poor isolation occurs in important frequency ranges due to high surface mobility in the foundation. The models used show that surface mobility is approximately equal to point mobility when the dimensions of the contact region are small compared to the governing wavelength in the supporting structure. Mobility changes significantly once the contact dimensions are of the order of, or larger than, the governing wavelength in the supporting structure.
Published
1998-09-01
How to Cite
1.
Williamson H, Lai J, Dai J, Norwood C, Li Y. Vibration isolation - exploring the foundations. Canadian Acoustics [Internet]. 1998Sep.1 [cited 2019Sep.19];26(3):40-1. Available from: https://jcaa.caa-aca.ca/index.php/jcaa/article/view/1147
Section
Proceedings of the Acoustics Week in Canada

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