512 T. Rogers et al. Frequency (Hz) 10-4 10-3 Magnitude Numerical Theoretical WNHZ Theoretical 0 5 10 15 20 25 30 35 40 0 5 10 15 20 25 30 35 40 Frequency (HZ) 0 50 100 150 Phase (degrees) Numerical Theoretical WNHZ Theoretical Fig. 45.2 Theoretical and numerical FRFs for 3DoF benchmark system. Vertical lines indicate the natural frequencies (WNHZ Theoretical) Frequency (Hz) 10-4 10-3 Magnitude Numerical Theoretical WNHZ Theoretical 0 5 10 15 20 25 30 35 40 45 0 5 10 15 20 25 30 35 40 45 Frequency (HZ) 0 50 100 150 Phase (degrees) Numerical Theoretical WNHZ Theoretical Fig. 45.3 Theoretical and numerical FRFs for 30DoF benchmark system. Vertical lines indicate the natural frequencies (WNHZ Theoretical)
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