Design and Characteristics Analysis of a Nonlinear Isolator Using a Curved-Mount-Spring-Roller Mechanism as Negative Stiffness Element

Figure 10

Absolute displacement and acceleration transmissibility of the overload isolator and the linear system with different offset displacements and cubic stiffness (a) for the offset displacement and (b) for the cubic stiffness. “Red line”: absolute displacement transmissibility. “Black line”: absolute acceleration transmissibility. “Blue line”: absolute displacement transmissibility of the ideal isolator. “Magenta line”: the linear system. “Green and red dotted line”: unstable solutions. “o” peak amplitude of transmissibility.

(a) For the offset displacement

(b) For the cubic stiffness