Effects produced by oscillations applied to nonlinear dynamic systems: a general approach and examples

I. I. Blekhman, V. S. Sorokin

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

A general approach to study effects produced by oscillations applied to nonlinear dynamic systems is developed. It implies a transition from initial governing equations of motion to much more simple equations describing only the main slow component of motions (the vibro-transformed dynamics equations). The approach is named as the oscillatory strobodynamics, since motions are perceived as under a stroboscopic light. The vibro-transformed dynamics equations comprise terms that capture the averaged effect of oscillations. The method of direct separation of motions appears to be an efficient and simple tool to derive these equations. A modification of the method applicable to study problems that do not imply restrictions on the spectrum of excitation frequencies is proposed. It allows also to abandon other restrictions usually introduced when employing the classical asymptotic methods, e.g., the requirement for the involved nonlinearities to be weak. The approach is illustrated by several relevant examples from various fields of science, e.g., mechanics, physics, chemistry and biophysics.
Original languageEnglish
JournalNonlinear Dynamics
Volume83
Issue number4
Pages (from-to)2125-2141
Number of pages17
ISSN0924-090X
DOIs
Publication statusPublished - 2016

Keywords

  • Oscillations
  • Nonlinear dynamic systems
  • Slow motion
  • Small parameter
  • The method of direct separation of motions

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