“…14,15 Among recent studies, it is worth mentioning the application of finite element (FEM) analysis, 16,17 ad hoc analytical methods, 18,19,20 simplified models for periodic systems, 21,22 exploitation of nonlinearities for enhanced or unusual performance, 23,24,25,26,27 and experimental campaigns. 28,29,30 A huge number of lattice structures and resonator architectures have been proposed for wave propagation control, including the quasi-zero-stiffness metamaterial beam 31 for LF flexural wave control, along the lines found in a wide literature, 32,33,34,35 The quasi-zero-stiffness metamaterial beam incorporated compact compliant structures, consisting of a combination of four multi-segment beams in parallel, instead of space-demanding mechanisms within the resonator. A metamaterial beam with nonlinear (cubic) multiresonators was proposed by Casalotti et al 36 The formation of multiple bandgaps was demonstrated together with the significant enlargement of the bandgaps thanks to the nonlinear frequency modulation with the amplitude.…”