156583.fig.0011a
(a)
156583.fig.0011b
(b)
156583.fig.0011c
(c)
156583.fig.0011d
(d)
Figure 11: Singular values of PSD of the responses (V1~V6) due to random excitation for the tested models: (a) undamaged model; (b) 22.2% delaminated model; (c) 51.9% delaminated model; (d) 74.1% delaminated model.