Theoretical Design and Characteristics Analysis of a Quasi-Zero Stiffness Isolator Using a Disk Spring as Negative Stiffness Element

Figure 10

FRCs of the bias term and the amplitude of the harmonic term for the optimal configurative parameters and . ((a)–(c)) The force excitation; ((d)–(f)) the displacement excitation; “green dotted line” unstable solution; “” numerical solution obtained by increasing frequency; “∘” numerical solution obtained by decreasing frequency.

(a) ,

(b) ,

(c) ,

(d) ,

(e) ,

(f) ,