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¼ö·Ï»çÇ× Çѱ¹ÁöÁø°øÇÐȸ Ãá°èÇмú¹ßǥȸ ³í¹®Áý (2012-03)
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¿ä¾à2 There are two ways for earthquakeproof design using metamaterial technology. One is cloaking of elastic waves and the other is an attenuation of seismic waves. The first method was introduced by Farat et al. The wave passes around an object surrounded by a coat of a radially symmetric multilayered cloak filled with piecewise constant isotropic Young modulus and mass density. The second method is to build metacylinders. It is a huge Helmholtz resonator that makes the shear modulus negative. When the surface wave passes the metacylinder, the velocity becomes imaginary and the wave decays to an evanescent wave. We suggest the size and constructing method of the metacylinders around the building.
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