A fundamental study on an application of a mechanism of metamaterials to a solid wave.

Abstract

This paper shows a fundamental study to apply the principle of metamaterial to solid waves. A method of making the effective mass negative and an effect of the negative mass for a lumped parameter system in which the governing equation is isomorphic to the central difference approximation formula of the wave equation are investigated from the viewpoint of damping / vibration isolation. The results are as follows: 1) The effective mass can be negative by connecting the dynamic damper or the Sky Hook spring to each mass of the main system. 2) The amplitude can be reduced with increasing distance from the vibration source by making the effective mass negative. 3) The interaction between them is very small when connecting normal structures to negative massed structures.