Research Article

Free-Decay Nonlinear System Identification via Mass-Change Scheme

Figure 18

Coefficients of the nonlinearities of the multistory building in logarithmic scales. Continuous black line: real part of the LS solution; dashed-dotted black line: imaginary part of the LS solution. (a) Cubic coefficient. (b) Quadratic coefficient.
(a)
(b)