Kavli Affiliate: Chiara Daraio
| First 5 Authors: Paolo Celli, Ilaria Nunzi, Andrea Calabrese, Stefano Lenci, Chiara Daraio
| Summary:
We show that shear waves traveling towards the surface of a half-space medium
can be attenuated via buried one-dimensional arrays of resonators — here
called metapiles — arranged according to sparse patterns around a site to be
isolated. Our focus is on shear waves approaching the surface along a direction
perpendicular to the surface itself. First, we illustrate the behavior of
metapiles, both experimentally and numerically, using 3D printed resonators
embedded in an acrylic plate. Then, via numerical simulations, we extend this
idea to the case study of an idealized soil half-space, and elucidate the
influence of various design parameters on wave attenuation. Results of this
work demonstrate that significant wave attenuation can be achieved by
installing sparse resonating piles around a selected site on the free surface
of the medium, rather than placing resonators directly underneath that same
site. This work might have implications in metamaterial-based wave attenuation
applications across scales.
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