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Journals
Applied Mathematics and Nonlinear Sciences
Volume 1 (2016): Issue 1 (January 2016)
Open Access
Vibrational resonance: a study with high-order word-series averaging
A. Murua
A. Murua
and
J.M. Sanz-Serna
J.M. Sanz-Serna
| Apr 06, 2016
Applied Mathematics and Nonlinear Sciences
Volume 1 (2016): Issue 1 (January 2016)
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Published Online:
Apr 06, 2016
Page range:
239 - 246
Received:
Feb 07, 2016
Accepted:
Apr 06, 2016
DOI:
https://doi.org/10.21042/AMNS.2016.1.00018
Keywords
High-order averaging
,
vibrational resonance
,
formal series
© 2016 A. Murua, J.M. Sanz-Serna, published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.
Fig. 1
Vibrational resonance. Accurate numerical integrations of the original oscillatory differential equation and of the averaged system based on words with ≤ 2 letters for two different values of the parameter B that measures the amplitude of the background vibration. In each panel the oscillatory solution appears as a band due to its fast dynamics; the averaged solution (in the centre of the band) varies at a much lower rate. A small increase in B from B = 0.52 (top panel) to B = 0.53 (bottom panel) lets the oscillator make substantially wider excursions without having to increment the amplitude A of the applied forcing.
Higher-order averaging
n
#
n
-letter words with
f
w
≠ 0
Error
B
= 0.52
Error
B
= 0.53
1
7
0.241
0.431
2
35
0.080
0.481
3
217
0.026
0.251
4
1,407
0.018
0.036
5
9,345
0.009
0.015
6
62,951
0.004
0.008
7
427,889
0.003
0.005