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Shock and Vibration
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2019
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Article
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Fig 9
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Research Article
Threshold for Chaos of a Duffing Oscillator with Fractional-Order Derivative
Figure 9
System response at
ω
= 3 rad/s and
F
= 1.5 N: (a) time history; (b) frequency spectrogram; (c) phase portrait; (d) Poincare maps.
(a)
(b)
(c)
(d)