Vibration Isolation of Machine Foundations by Periodic Trenches
Publication: Journal of Engineering Mechanics
Volume 124, Issue 4
Abstract
A unified method is proposed for screening the ground-transmitted vibrations generated by machine foundations. The method is based on the solid-state phenomenon of Bragg resonance, which leads to the fact that periodic shallow trenches are capable of reflecting a considerable amount of wave energy if they are carefully designed to have a tuned periodicity with the propagating modes. The method of multiple scales is used to derive the coupled-mode equations, describing the interaction of propagating waves with the tuned periodic trenches. Reflection coefficients are calculated to evaluate the effectiveness of the trenches in reducing wave amplitudes.
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Information & Authors
Information
Published In
Journal of Engineering Mechanics
Volume 124 • Issue 4 • April 1998
Pages: 422 - 427
Copyright
Copyright © 1998 American Society of Civil Engineers.
History
Published online: Apr 1, 1998
Published in print: Apr 1998
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