Research Article
Modal Identification Using OMA Techniques: Nonlinearity Effect
Figure 3
(a) 4DOF model with local nonlinearity ( kg, N⋅m−1, kg⋅s−1, , and ). (b) Evolution of the BLAs associated with the 3rd mass when the input is located at the 4th mass with three levels of excitation and perturbed lines displayed below represent the standard deviations of the nonlinear distortions (black: strong, dark gray: medium, and light gray: weak).
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