A pendulum excited by high-frequency horizontal displacement of its pivot point will vibrate with small amplitude about a mean position. The mean value is zero for small excitation amplitudes, but if the excitation is large enough the mean angle can take on non-zero values. This behavior is analyzed using the method of multiple time scales. The change in the mean angle is shown to be the result of a pitchfork bifurcation, or a saddle-node bifurcation if the system is imperfect. Analytical predictions of the mean angle as a function of frequency and amplitude are confirmed by physical experiment and numerical simulation.
%0 Journal Article
%1 Schmitt1998
%A Schmitt, John M.
%A Bayly, Philip V.
%D 1998
%J Nonlinear Dynamics
%K 70-05-experimental-work-for-problems-relating-to-mechanics-of-particles-and-systems 70k20-stability-for-nonlinear-problems-in-mechanics 70k40-forced-motions-for-nonlinear-problems-in-mechanics
%N 1
%P 1--14
%R 10.1023/A:1008279910762
%T Bifurcations in the Mean Angle of a Horizontally Shaken Pendulum: Analysis and Experiment
%U https://link.springer.com/article/10.1023%2FA%3A1008279910762
%V 15
%X A pendulum excited by high-frequency horizontal displacement of its pivot point will vibrate with small amplitude about a mean position. The mean value is zero for small excitation amplitudes, but if the excitation is large enough the mean angle can take on non-zero values. This behavior is analyzed using the method of multiple time scales. The change in the mean angle is shown to be the result of a pitchfork bifurcation, or a saddle-node bifurcation if the system is imperfect. Analytical predictions of the mean angle as a function of frequency and amplitude are confirmed by physical experiment and numerical simulation.
@article{Schmitt1998,
abstract = {A pendulum excited by high-frequency horizontal displacement of its pivot point will vibrate with small amplitude about a mean position. The mean value is zero for small excitation amplitudes, but if the excitation is large enough the mean angle can take on non-zero values. This behavior is analyzed using the method of multiple time scales. The change in the mean angle is shown to be the result of a pitchfork bifurcation, or a saddle-node bifurcation if the system is imperfect. Analytical predictions of the mean angle as a function of frequency and amplitude are confirmed by physical experiment and numerical simulation.},
added-at = {2021-11-17T05:57:31.000+0100},
author = {Schmitt, John M. and Bayly, Philip V.},
biburl = {https://www.bibsonomy.org/bibtex/2d51506238c690b8c5a5c8fced64506c3/gdmcbain},
day = 01,
doi = {10.1023/A:1008279910762},
interhash = {371c08fd05410d7a187eee2bda1e2ac3},
intrahash = {d51506238c690b8c5a5c8fced64506c3},
issn = {1573-269X},
journal = {Nonlinear Dynamics},
keywords = {70-05-experimental-work-for-problems-relating-to-mechanics-of-particles-and-systems 70k20-stability-for-nonlinear-problems-in-mechanics 70k40-forced-motions-for-nonlinear-problems-in-mechanics},
month = jan,
number = 1,
pages = {1--14},
timestamp = {2021-11-17T06:24:17.000+0100},
title = {Bifurcations in the Mean Angle of a Horizontally Shaken Pendulum: Analysis and Experiment},
url = {https://link.springer.com/article/10.1023%2FA%3A1008279910762},
volume = 15,
year = 1998
}