Tunable integrated quasi-zero-stiffness metamaterials for ultra-low-frequency vibration isolation

Abstract Quasi-zero-stiffness (QZS) structures play an important role in ultra-low frequency vibration isolation due to its nonlinear mechanical properties, how to make it more lightweight while ensuring performance is an important research topic in expanding its application areas. In this paper, an integrated QZS metamaterial element for ultra-low frequency vibration isolation (around 4Hz). Relying on the nonlinear mechanical properties of metamaterials, the initial structural parameters are optimized to achieve QZS within a specific deformation range, providing a theoretical analysis basis for structural performance design. Static simulation analysis and experiments verified the effectiveness of the optimization design process. Further vibration experiments confirmed the ultra-low frequency vibration isolation ability of this metamaterial element. This customizable metamaterial with a size of tens of millimeters provides new ideas and solutions for ultra-low frequency vibration isolation of small precision components.