@article{oai:mie-u.repo.nii.ac.jp:00013147,
 author = {牧原, 義一 and Makihara, Yoshikazu and 國仲, 寛人 and Kuninaka, Hiroto},
 journal = {三重大学教育学部研究紀要　自然科学・人文科学・社会科学・教育科学・教育実践, Bulletin of the Faculty of Education, Mie University. Natural Science, Humanities, Social Science, Education, Educational Practice},
 month = {Jan},
 note = {application/pdf, Nonlinear forced oscillation of an inverted elastic pendulum, which has a massive bob on the top of a vertically standing stainless thin rod, is investigated by measuring the frequency response curve of the pendulum. The pendulum is driven by reciprocating the bottom of the rod periodically in a direction defined as y-axis.
The pendulum shows hard characteristics whose amplitude for the elliptical orbit of the massive bob increases with increasing driving frequency. Further increase in driving frequency causes abrupt decrease in amplitude at a certain frequency. With decreasing the driving frequency, on the other hand, a similar jump phenomenon (abrupt increase) is observed at lower frequency than that where the abrupt decrease occurs with a large hysteresis phenomenon. This result indicates a characteristic of the nonlinear oscillation.
In the experiment where the amplitude of reciprocal motion is increased, it is found that as soon as the amplitude of semimajor axis of the orbit takes a small and abrupt decrease, the amplitude of semi-minor axis shows an abrupt increase, resulting in a large circular orbit of the massive bob. Large amplitude of the orbit decreases abruptly at a higher driving frequency.These peculiar characteristics of nonlinear motion in the system are investigated in detail.},
 pages = {31--38},
 title = {倒立弾性振り子の強制振動},
 volume = {70},
 year = {2019},
 yomi = {マキハラ, ヨシカズ and クニナカ, ヒロト}
}