Approximate Model for a Viscoelastic Oscillator

Autor:	Yohannes Ketema
Rok vydání:	2003
Předmět:	Physics Viscous damping Bar (music) Mechanical Engineering Frequency shift Natural frequency Mechanics Condensed Matter Physics Viscoelasticity Vibration Classical mechanics Mechanics of Materials Restoring force Harmonic oscillator
Zdroj:	Journal of Applied Mechanics. 70:757-761
ISSN:	1528-9036 0021-8936
Popis:	An oscillator where the restoring force is furnished by a viscoelastic bar and therefore depends on the history of the motion is considered. The history-dependent force is characterized by a relaxation modulus and a relaxation time. Assuming that the relaxation time is small, an approximate model for the oscillator is derived. This model is then linearized for the study of small vibrations. It is shown that the viscoelastic force, in addition to viscous damping, effects an apparent decrease in mass that modifies the natural frequency of the linear oscillator. The temperature dependence of the relaxation time, and consequently the frequency shift, is studied.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::5d02a669a978e92ac7ccb9a46e7088c7 https://doi.org/10.1115/1.1607355 Zobrazit plný text záznamu