Generation of harmonic waves in a mass-in mass model of an acoustic metamaterial is considered. It is shown numerically that outside the band gap, the boundary harmonic excitation gives rise to a formation of periodic waves whose profile gradually coincides with the profile of the exact traveling wave harmonic solution. No waves are generated by the boundary excitation inside the band gap. A switch-on/off control is developed to achieve the formation of the harmonic waves inside the band gap.

中文翻译：

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声学超材料中谐波的控制

考虑了声学超材料的质量模型中谐波的产生。数值表明，在带隙之外，边界谐波激励会形成周期波，其轮廓逐渐与精确的行波谐波解的轮廓一致。带隙内的边界激发不会产生波。开发了开关控制来实现带隙内谐波的形成。