Dynamics of Machines - Part II - IFS.pdf

Imag(A(ω)) [m/N]
0
−1
−2
−3
−4
−5
−6
−7
−8
Frequency Response Function (Real Part)
ξ=0.005
ξ=0.05
−9
−5 −4 −3 −2 −1 0 1 2 3 4 5
Real(A(ω)) [m/N]
Figure 16: Steady state response in the frequency domain or Frequency Response Function (FRF)
illustrated as the real versus the imaginary part of A =
Imag(A(ω)) [m/N]
0
−0.5
−1
−1.5
−2
1
0.5
Real(A(ω)) [m/N]
0
Frequency Response Function
−0.5
0
0.5
f/m
−ω 2 +ω 2 n +i2ξωnω.
1
1.5
Frequency [Hz]
2
ξ=0.05
Figure 17: Steady state response in the frequency domain or Frequency Response Function (FRF)
f/m
illustrated in a 3D-plot: the real and imaginary parts of A = −ω2 +ω2 as a function of the
n+i2ξωnω
frequency.
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