Kresling origami-based metamaterial beam with equivalent quasi-zero stiffness for dual bandgaps

Kresling origami structures have attracted extensive research interest in the metamaterial field. This study presents a novel locally coupled resonant metamaterial beam based on conical Kresling origami, demonstrating dual tuneable bandgaps spanning ultralow-frequency and high-frequency regimes. Unlike the ultralow-frequency suppression achieved by traditional quasi-zero stiffness, the equivalent quasi-zero stiffness mechanism combined with the compression‒torsion coupling effect can generate an additional high-frequency bandgap. The dispersion relation and flexural wave transmissibility of the metamaterial beam are theoretically derived using the spectral element method. Finally, prototypes are designed and fabricated, where quasi-static experiments on origami unit cells are performed to obtain equivalent quasi-zero stiffness conditions, and dynamic experiments on the metamaterial beam are carried out to validate the tuneable flexural wave attenuation zones. The proposed metamaterial system holds promising potential for engineering applications demanding vibration suppression across ultralow-frequency and multiple-frequency domains.