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- W4376127823 endingPage "112306" @default.
- W4376127823 startingPage "112306" @default.
- W4376127823 abstract "An electrically-tunable metamaterial is herein designed for the active control of damped elastic waves. The periodic device is conceived including both elastic phases and a piezoelectric phase, shunted by a dissipative electric circuit whose impedance/admittance can be adjusted on demand. As a consequence, the frequency band structure of the metamaterial can be modified to meet design requirements, possibly changing over time. A significant issue is that in the presence of a dissipative circuit, the frequency spectra are obtained by solving eigen-problems with rational terms. This circumstance makes the problem particularly difficult to treat, either resorting to analytical or numerical techniques. In this context, a new derationalization strategy is proposed to overcome some limitations of standard approaches. The starting point is an infinite-dimensional rational eigen-problem, obtained by expanding in their Fourier series the periodic terms involved in the governing dynamic equations. A special derationalization is then applied to the truncated eigen-problem. The key idea is exploiting a LU factorization of the matrix collecting the rational terms. The method allows to considerably reduce the size of the problem to solve with respect to available techniques in literature. This strategy is successfully applied to the case of a three-phase metamaterial shunted by a series RLC circuit with rational admittance." @default.
- W4376127823 created "2023-05-12" @default.
- W4376127823 creator A5033482554 @default.
- W4376127823 creator A5039011924 @default.
- W4376127823 creator A5071858817 @default.
- W4376127823 date "2023-08-01" @default.
- W4376127823 modified "2023-10-14" @default.
- W4376127823 title "Electrically-tunable active metamaterials for damped elastic wave propagation control" @default.
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