Analysis and Design of Vibration Isolation System Using Open Trenches
Publication: International Journal of Geomechanics
Volume 11, Issue 5
Abstract
Field vibration tests were carried out at a proposed site for the vibration testing room, and 2D numerical analysis using finite difference tool FLAC 5.0 was performed to suggest effective vibration isolation systems. In the analysis, the numerical model is first calibrated with respect to material properties, damping value, and boundary conditions to obtain the output comparable to the field test results. The calibrated model was further used to perform a parametric study by (1) providing vibrating input motions from vibrating machines to be operated; (2) using two depths of cutoff trench; and (3) providing gravel bed, gravel bed with rubber pad, and gravel bed with rubber pad and cutoff trench to study the isolation effects. Comparing the results from the parametric studies with the human perception level of vibration, a decision on the isolation system was determined.
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Information
Published In
International Journal of Geomechanics
Volume 11 • Issue 5 • October 2011
Pages: 364 - 369
Copyright
© 2011 American Society of Civil Engineers.
History
Received: Nov 23, 2009
Accepted: Oct 21, 2010
Published online: Oct 26, 2010
Published in print: Oct 1, 2011
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