Results 261 to 270 of about 22,087 (289)

Comparison of Methods for Computing Equivalent Viscous Damping Ratios of Structures with Added Viscous Damping

Journal of Structural Engineering, 2008
Three analysis methods are compared for determining the equivalent viscous damping ratios in a simple one-story, one-bay system with three different added damping configurations. The analysis methods are modal strain energy using the undamped mode shapes, free vibration log decrement, and complex eigenvalue-eigenvector analysis.
Finley A. Charney, Robert J. McNamara
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Equivalent uniform damping ratios for linear irregularly damped concrete/steel mixed structures

Soil Dynamics and Earthquake Engineering, 2011
Abstract Structures consisting of two parts, a lower part made of concrete and an upper part made of steel are investigated. In code-based seismic design of such structures several practical difficulties are encountered, due to inherent differences in the nature of dynamic response of each part.
A.V. Papageorgiou, C.J. Gantes
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Equivalent stresses for representing damping in combined stress

Journal of Sound and Vibration, 1969
Proposals for representing damping under combined stress conditions in terms of an equivalent simple stress are examined. Some general requirements which such proposals must satisfy are developed and certain anomalies in previous proposals are pointed out.
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The Calculation of the Equivalent Linear Damping Coefficient of the Magnetorheological Damper

Applied Mechanics and Materials, 2013
MR damper (magnetorheological damper) has broad application prospects, and equivalent damping coefficient is very important of its dynamic characteristic analysis. Based on the modified Bouc_Wen model, the performance of MR damper was analyzed and the equivalent linear damping coefficient of MR damper was calculated.
Yao Hui Guo, En Wei Chen, Qun Wu, Yi Min Lu, Zeng Qiang Xia   +4 more
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Comparison of Equivalent Viscous Damping and Nonlinear Damping in Discrete and Continuous Vibrating Systems

Journal of Vibration and Acoustics, 1983
The study of nonlinear damping in vibrations is motivated by the desire to represent and predict real responses more accurately than allowed by the limitations of linear analysis, since observed phenomena are, in general, actually nonlinear in nature.
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Equivalent Stiffness and Damping Investigation of a Hydrostatic Journal Bearing

Tribology Transactions, 2007
The aim of this research is to study the dynamic characteristics of a hydrostatic journal bearing, with four hydrostatic bearing flat pads fed by diaphragm restrictors and supporting a rotor. We assumed that the fluid flow is incompressible, laminar, isothermal, and steady-state.
Ahmed Bouzidane, Marc Thomas
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Using an equivalence of response for the mechanical oscillator to estimate damping

The Journal of the Acoustical Society of America, 1988
This letter examines the behavior characteristics of the mechanical oscillator composed of a mass, spring, and dashpot. An equivalence of response is observed between an undamped oscillator subjected to a decaying sinusoidal forcing function and a damped oscillator subjected to a sinusoidal forcing function.
George J. O’Hara, Patrick F. Cunniff
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Experimental Estimation of Equivalent Damping Coefficient of Thrust Bearings

2018
A specific class of rotary machines is the high rotation turbochargers, to automotive application, wherein the shaft is continually subjected to axial forces of different magnitudes due to gas flows in the turbine and the compressor. These forces are supported by axial lubricated thrust bearings.
Thales Freitas Peixoto, Gregory Bregion Daniel, Katia Lucchesi Cavalca   +2 more
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Equivalent damping ratios of nonclassically damped structures composed of two substructures along the height by using equivalent two‐degree‐of‐freedom systems

The Structural Design of Tall and Special Buildings
AbstractThe nonconventional damping properties of structures, composed of two substructures with different damping ratios along the height, make an exact seismic analysis very complex. Determining an equivalent damping ratio for such structures makes the time‐history analysis (THA) possible through conventional analysis methods.
Amir Saadatkhah, Mohammad Reza Chenaghlou, Mehdi Poursha   +2 more
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An equivalent mechanical model with nonlinear damping for sloshing rectangular tank with porous media

Ocean Engineering, 2021
Wen-Huai Tsao, Li-Hsiang Huang, Wei-Shien Hwang   +2 more
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