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

Figure 11

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

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