The effect of stress relaxation on the vibration of a viscoelastic string

Autor:	K.K. Stevens
Rok vydání:	1972
Předmět:	Physics Acoustics and Ultrasonics Tension (physics) Mechanical Engineering Resonance Natural frequency Mechanics Condensed Matter Physics Viscoelasticity Vibration Classical mechanics Amplitude Mechanics of Materials Stress relaxation C++ string handling
Zdroj:	Journal of Sound and Vibration. 20:257-268
ISSN:	0022-460X
DOI:	10.1016/0022-460x(72)90606-2
Popis:	Some of the qualitative aspects of the free and forced lateral vibration of a relaxing string are investigated. First-order approximations for the amplitude and phase angle are obtained by using asymptotic methods. It is shown that the relaxing tension gives rise to what can be considered to be a time-dependent “natural frequency” and an equivalent negative damping, and can lead to a transition through “resonance” Some experimental evidence of such transitions through resonance is presented. The results obtained indicate that in most practical cases the amplitude of the forced response can be obtained with sufficient accuracy by merely substituting the variable tension into the expression for the amplitude of a string with constant tension.
Databáze:	OpenAIRE
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