A novel MSC origami structure for full-frequency domain vibration isolation: Design and realization

This study presents an innovative quasi zero stiffness (QZS) vibration isolator based on a magic spiral cube (MSC) origami structure. Through the design of its negative stiffness characteristic, the structure achieves a wide constant force constitutive behavior. Addressing the challenge of simultaneously realizing broad QZS properties, load capacity, and structural stability in existing variable-stiffness systems, the proposed isolator achieves a QZS range covering nearly 25% of the unit cell’s deformable range, a load-bearing capacity up to 20 times its own weight, and significantly enhanced low-frequency vibration isolate performance. By integrating nonlinear dynamic modeling and stable state response analysis, the effective operational range of the MSC origami isolator has been successfully extended. Experimental results conclusively validate the model reliability and demonstrate the structure’s strong potential for broadband vibration suppression. This study provides a novel design strategy for flexible metastructure based isolators, showing promising application prospects in vibration reduction for precision equipment and protective systems in aerospace structures.