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Higher-Order Pseudoaveraging via Harmonic Balance for Strongly Nonlinear Oscillations

Nandakumar, K and Chatterjee, Anindya (2005) Higher-Order Pseudoaveraging via Harmonic Balance for Strongly Nonlinear Oscillations. In: Journal of Vibration and Acoustics, 127 (4). pp. 416-419.

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Some strongly nonlinear conservative oscillators, on slight perturbation, can be studied via averaging of elliptic functions. These and many other oscillations allow harmonic balance-based averaging (HBBA), recently developed as an approximate first-order calculation. Here, we extend HBBA to higher orders. Unlike the usual higher-order averaging for weakly nonlinear oscillations, here both the dynamic variable and time are averaged with respect to an auxiliary variable. Since the harmonic balance approximations introduce technically 0(l) errors at each order the higher-order results are not strictly asymptotic. Nevertheless, as we show with examples, for reasonable values of the small expansion parameter excellent approximations are obtained.

Item Type: Journal Article
Publication: Journal of Vibration and Acoustics
Publisher: The American Society of Mechanical Engineers
Additional Information: Copyright of this article belongs to The American Society of Mechanical Engineers.
Keywords: Approximate Asymptotics;Elliptic Functions;Averaging Method
Department/Centre: Division of Mechanical Sciences > Mechanical Engineering
Date Deposited: 12 Aug 2009 06:54
Last Modified: 19 Sep 2010 04:55
URI: http://eprints.iisc.ac.in/id/eprint/17125

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