Lightweight, ultra-low-frequency torsional vibration isolator based on Kresling origami

Abstract Springs inspired by the Kresling origami pattern have recently gained prominence as a foundation for developing functional engineering systems with versatile properties, catering to niche applications across various technological fields. With minimal adjustments to their geometric parameters, the restoring force of such springs can be tuned to exhibit quasi-zero stiffness (QZS) behavior that is ideal for designing low-frequency vibration isolators. In this work, we present the design, fabrication, and performance analysis of a fully functional, ultra-low-frequency torsional vibration isolator based on the Kresling origami spring. Fabricated from single-phase Nylon PA12 using selective laser sintering, the isolator weighs less than 5 grams and combines high static stiffness with low dynamic stiffness, enabling compact, scalable, and cost-effective isolation solutions. Unlike many existing QZS designs that are complex or suited only for large systems, this design is easily manufactured, durable, and well-suited for precision engineering. Quasi-static torsional tests reveal a broad QZS region, while dynamic testing shows a nearly linear response and effective vibration attenuation beginning at frequencies as low as 2.5 Hz, even under large-amplitude excitations. Furthermore, the isolator shows high endurance to prolonged cyclic loading with negligible performance degradation. These findings highlight the potential of origami-inspired structures in creating scalable, high-performance vibration isolators and provide a strong foundation for future research in advanced dynamic applications.