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

Figure 14

Experimental results for the acceleration transmissibility of the nonlinear and the linear isolator under different excitation amplitudes and the offsets: (a) overload system for excitation amplitude of 3 mm--green, 3.5 mm--cyan, 4 mm--black, 4.5 mm--red, 5 mm--blue, the linear system--magenta; (b) underload system for excitation amplitude of 3 mm--green, 3.5 mm--cyan, 4 mm--black, 4.5 mm--red, 5 mm--blue; (c) comparison among the ideal system--black, overload system--blue and underload system--red; and (d) overload system for the mass of 27.6 kg--red, 28.4 kg--blue.

(a)

(b)

(c)

(d)