equivalent viscous damping

equivalent viscous damping

[i′kwiv·ə·lənt ¦vis·kəs ′damp·iŋ]
(mechanics)
An assumed value of viscous damping used in analyzing a vibratory motion, such that the dissipation of energy per cycle at resonance is the same for the assumed or the actual damping force.
References in periodicals archive ?
For each specimen, three major factors [3], including energy dissipation ([E.sub.h]), elastic strain energy ([E.sub.e]), and equivalent viscous damping ratio ([[xi].sub.eq]), were calculated for each hysteric loop with MATLAB.
In this paper, Jacobson's equivalent viscous damping coefficient is used to represent the energy dissipation capacity of the specimen [20].
Lin and Chang [8] improved ICSM by using the real absolute acceleration response spectrum instead of the pseudo-acceleration response spectrum, especially for them system with equivalent viscous damping ratio [[beta].sub.eq] > 10% and period T > 0.15 s.
In this paper, the method generally suggested in seismic standards and codes [6,7] for estimating equivalent period and the equivalent viscous damping ratio was applied.
The elastic response spectra at different limit states for equivalent viscous damping ratio [xi] = 5% are shown in Figure 2(c): Frequent Design Earthquake (FDE); Serviceability Design Earthquake (SDE); Basic Design Earthquake (BDE); Maximum Considered Earthquake (MCE).
The Bingham plastic model does not account for such behavior, resulting in over prediction of equivalent viscous damping. We present a Bingham bi-plastic model that can account for both shear thinning and shear thickening behaviors.
As mentioned above, comparative issue of energy dissipation and ratio of equivalent viscous damping in different states of wall crater has not been studied clearly.
The equivalent viscous damping coefficient [xi] is quantifying the hysteresis response of structural components, and as such, it is one of the key indicators describing their behavior.
Moreover, because of the significant differences between the damping and yielding reductions, the effect of yielding should explicitly be calculated by using complex 3D MDOF models instead of estimating it in terms of equivalent viscous damping. The findings of this paper are for the particular structural systems, models, and earthquakes used in the study.
ABSTRACT: In this paper, results of an experimental study to investigate the equivalent viscous damping (EVD) of the concrete reinforced with metallic fibers in mono and hybrid form have been presented.
The effect of geometry and extent of gravity load on various parameters used to quantify seismic performance such as equivalent viscous damping for evaluating energy dissipation capacity, ultimate ductility and drift ratio of the walls is examined and discussed.