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Torsional parametric oscillations in wires

N B Tufillaro

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Quite some time ago, Melde (experimentally) and Rayleigh (theoretically) investigated one of the earliest examples of a parametric oscillator. They showed that a periodic modulation of a string's length (longitudinal excitation) gives rise to transverse string vibrations. A similar effect is observed when a periodic torsional modulation is applied to a wire; i.e. twisting a wire can parametrically excite transverse vibrations.


PACS

46.70.Hg Membranes, rods and strings

46.05.+b General theory of continuum mechanics of solids

46.15.Ff Perturbation and complex analysis methods

Subjects

Mathematical physics

Computational physics

Condensed matter: structural, mechanical & thermal

Dates

Issue 2 (March 1990)



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