Subharmonic travelling waves in a geometrically non-linear circular plate

Tariq A. Nayfeh, Alexander F. Vakakis

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52 Scopus citations


The subhannonic motions of thin, axisymmetric, geometrically non-linear circular plates are analyzed. It is well known that such cyclic systems possess pairs of degenerate modes in "1-1" internal resonance, i.e. modes having equal linearized natural frequencies. The non-linear interaction of such a pair of modes is examined by discretizing the non-linear partial differential equations of motion and then investigating the resulting set of non-linear ordinary differential equations analytically and numerically. Two types of forced subhannonic motions are detected, namely subharmonic standing waves (SSW) and subharmonic travelling waves (STW). Moreover, it is found that for sufficiently large values of frequency detuning of the forcing function the STW lose stability in a Hopf bifurcation, leading to quasi-periodic motions of the plate, i.e. to oscillations on a two-torus. The analytical results are confirmed by numerical integrations of the equations of motion and by numerical Poincare maps. The results reported in this work are expected to have applicability on the dynamic analysis and design ofthin, flexible disks, of the type used for data storage in the computer industry.

Original languageEnglish (US)
Pages (from-to)233-245
Number of pages13
JournalInternational Journal of Non-Linear Mechanics
Issue number2
StatePublished - Mar 1994
Externally publishedYes

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Applied Mathematics


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