Effects of Locally Distributed Kelvin-Voigt Damping on Parametric Instability of Timoshenko Beams

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题名:	Effects of Locally Distributed Kelvin-Voigt Damping on Parametric Instability of Timoshenko Beams
作者:	Chen, Wei-Ren p Chen, Chun-Sheng
贡献者:	機械系
关键词:	Parametric instability Timoshenko beam internal damping Kelvin-Voigt damping instability region
日期:	2014-08
上传时间:	2015-01-22 09:44:17 (UTC+8)
摘要:	The effect of partially distributed internal damping of the Kelvin-Voigt type on the parametric instability of a Timoshenko beam subjected to periodic axial loads is studied. To model the dynamic behavior of the beam, a coupled set of second-order linear ordinary differential equations with periodic coefficients is established by the finite element method. A quadratic eigenvalue equation is derived for a parametrically excited damped system to determine the instability regions of the beam of concern based on Bolotin's method. The effects of internal damping, size and location of the damped segment, ratio of thickness to length and static load factor on the parametric instability of the beam are studied, along with the stabilizing effect of the Kelvin-Voigt damping on the primary parametric resonance presented. The results reveal that the beam with a larger damped segment positioned near the fixed end is dynamically more stable.
關聯:	INTERNATIONAL JOURNAL OF STRUCTURAL STABILITY AND DYNAMICS 卷: 14 期: 6 文獻號碼: 1450014
显示于类别:	[Department of Mechanical Engineering ] journal articles

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