Different from the external incentive system, in the parametric excitation system, when the frequency of the excitation is equal to multiple system natural frequency of a certain order, small incentives can also stimulate alarge system response [1-3].
The cable vibration test model is designed by itself, dynamic characteristics of test model are obtained using numerical simulation and dynamic characteristic test analysis of the free vibration of stayed cable to carry out the discussion on 2 : 1 parametric excitation resonance test, and the conclusion which is valuable for engineering application can be obtained.
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Chen, "Chaotic motions of the duffing-van der pol oscillator with external and parametric excitations," Shock and Vibration, vol.
The specific behaviour of the microwave effect--its dependence on the modulation frequency whereas the effect is evident at the EEG frequencies close or lower than the modulation frequency--leads us to the idea that the parametric excitation would be a suitable mechanism for the effect.
The proposed model of parametric excitation is helpful for the interpretation of the experimental results on the critical dependence of the effect on modulation frequency and noncritical dependence on the level of power density of the radiation.
11] used multiple scales to investigate principal resonance response of SDOF system with small fractional derivative damping under narrowband random parametric excitation