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

Figure 12

FRCs of the QZS isolator and ELS with different offset displacements and excitation amplitudes for the displacement excitation. “Red line” the disturbed isolator with ; “blue line” the disturbed isolator with ; “black line” the ideal system; “magenta line” ELS; “green dotted line” unstable solutions; “o” peak amplitude of response.

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