An archetypal zero- or quasi-zero-stiffness model with three degrees of freedom based upon an inverse method

In this paper, a three degrees of freedom archetypal model with arbitrary designable features and its inverse construction method based upon the target restoring force functions are proposed. The conditions zero-stiffness quasi-zero-stiffness systems 3-DOF have been studied in detail, by introducing definitions system, model. static characteristic low-frequency vibration isolation performance multiple direction analyzed, comparing linear system same support stiffness. conclusion shows that there finite solutions for characteristic, infinite on dimensionless parameters. feasibility constructing will lead to new inspiration design passive structures; is significantly improved compared which expresses great potential multi-DOF low-frequency, ultra-low-frequency isolation.