(a) (b) Fig.2: Simulated FRF and Transmissibility of a SDOF nonlinear system with different levels of force and base-displacement excitation: (a) hardening cubic stiffness, (b) Coulomb damping. 9.6 9.8 10 10.2 10.4 0 0.5 1 1.5 2 2.5 3 3.5 4 x 10 -3 Frequency [Hz] Response displacement [m] Cubic Hardening stiffness FRF 0.1N FRF 0.2N T 1.5e-2mm T 2e-2mm T 4e-2mm 9.6 9.8 10 10.2 10.4 0 0.2 0.4 0.6 0.8 1 Frequency [Hz] Response displacement [m] Coulomb damping FRF 10N FRF 20N FRF 50N T 1mm T 2.5mm T 5mm 484
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