386 G. Canbalog˘lu and H.N. Özgüven −3.5 −4 −4.2 −4.4 −4.6 −4.8 −5.2 −5.4 −5.6 −5.8 −6 −5 −4.5 −5 −5.5 −6 0.6 0.4 0.8 1.2 1.4 1.6 FRF-Experimental FRF-Initial FE Model FRF-Updated FE Model FRF-Experimental FRF-Initial FE Model FRF-Updated FE Model FRF-Experimental FRF-Initial FE Model FRF-Updated FE Model 1 Scaled Frequency [Hz] Scaled Frequency [Hz] 0.6 0.4 0.8 1 1.2 1.4 1.6 −4 −4.2 −4.4 −4.6 −4.8 −5.2 −5.4 −5.6 −5.8 −6 −5 Scaled Frequency [Hz] 0.6 0.4 0.8 1 1.2 1.4 1.6 Log(FRF [m/N]) Log(FRF [m/N]) Log(FRF [m/N]) −4 a c b Fig. 34.30 Comparison of FRFs obtained from initial and updated models with the experimental ones for (a)FD5N, (b)FD10.4N, (c)FD15N is thus concluded that the method previously proposed by the authors can successfully be applied to complex engineering problems for obtaining accurate nonlinear models. Acknowledgements The authors would like to thank to the Scientific and Technological Research Council of Turkey (TÜB˙ITAK) for giving the financial support throughout this work.
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