Vibration isolation of saturated foundations by functionally graded wave impeding block under a moving load
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Based on the Biot’s model for saturated porous media and functionally graded materials (FGMs), the isolation effect of saturated porous FG wave impeding block (WIB) on reducing vibration induced by a moving load in a saturated foundation is studied. The dynamic governing equations for saturated foundations under a moving load are obtained by using the coordinate transformation, and the expression of displacement and stress is derived based on the Fourier transform and the reverberation-ray matrix method. Via numerical examples, the isolation effect of saturated porous FG WIB under a moving load is analyzed. The results show that the saturated porous FG WIB can effectively reduce the vibration amplitude and has more advantages and effective under a moving load.
KeywordsSaturated porous media Functionally graded materials Wave impeding block Ground vibration
This work was supported by the National Natural Science Foundation of China (Grant No. 51368038), the Cooperation Program of Qinghai Province (Grant No. 2017-HZ-80) and the Science and technology basic condition platform of Qinghai Province (Grant No. 2018-ZJ-T01). The authors are also grateful to reviewers for their helpful advice and comments.
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