Relevant bibliographies by topics / Effective viscous damping

Contents

  1. Journal articles

Academic literature on the topic 'Effective viscous damping'

Author: Grafiati
Published: 4 June 2021
Last updated: 8 February 2022

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Effective viscous damping.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Journal articles on the topic "Effective viscous damping"

1

Kim, Chan-Jung. "Sensitivity of the Viscous Damping Coefficient of Carbon Fiber in Carbon-Fiber-Reinforced Plastic with Respect to the Fiber Angle." Crystals 11, no. 7 (2021): 781. http://dx.doi.org/10.3390/cryst11070781.

Full text
Abstract:
The variation in the viscous damping coefficient with the carbon fiber angle can be evaluated using the partial derivatives of the viscous damping coefficient with respect to the resonance frequency and modal damping ratio. However, the direct derivatives of the viscous damping coefficient were not effective solutions to the sensitivity analysis of carbon-fiber-reinforced plastic (CFRP) structures because the viscous damping from the binding matrix was not changed over the carbon fiber angle. If the identified viscous damping coefficients were assumed to be equivalent values from the parallel relationship between the binding matrix and carbon fiber, the relative error of the viscous damping coefficient of carbon fiber between the increased carbon fiber angle and reference angle could be used as the sensitivity index for the viscous damping coefficient of carbon fiber only. The modal parameters, resonance frequency, and modal damping ratio were identified from the experimental modal test of rectangular CFRP specimens for five different carbon fiber angles between 0° and 90°. The sensitivity of the viscous damping coefficient of carbon fiber was determined for two sensitivity indices: the direct derivative of the mass-normalized equivalent viscous damping coefficient and the relative error of the viscous damping coefficient of carbon fiber. The sensitivity results were discussed using the five mode shapes of the CFRP specimen, that is, three bending modes and two twisting modes.
APA, Harvard, Vancouver, ISO, and other styles
2

Whittaker, Andrew S., Michael C. Constantinou, Oscar M. Ramirez, Martin W. Johnson, and Christis Z. Chrysostomou. "Equivalent Lateral Force and Modal Analysis Procedures of the 2000 NEHRP Provisions for Buildings with Damping Systems." Earthquake Spectra 19, no. 4 (2003): 959–80. http://dx.doi.org/10.1193/1.1622391.

Full text
Abstract:
Equivalent lateral force and modal analysis procedures for yielding buildings with damping systems were developed, validated, and incorporated in the 2000 NEHRP Provisions. The technical basis for each procedure is described in the paper together with the simplifications adopted for inclusion in the Provisions. Procedures for calculating the effective damping and effective period and higher mode damping ratios for buildings equipped with yielding, viscoelastic, linear viscous, and nonlinear viscous damping devices are presented.
APA, Harvard, Vancouver, ISO, and other styles
3

Hinze, Matthias, André Schmidt, and Remco I. Leine. "Lyapunov Stability of a Fractionally Damped Oscillator with Linear (Anti-)Damping." International Journal of Nonlinear Sciences and Numerical Simulation 21, no. 5 (2020): 425–42. http://dx.doi.org/10.1515/ijnsns-2018-0381.

Full text
Abstract:
AbstractIn this paper, we develop a Lyapunov stability framework for fractionally damped mechanical systems. In particular, we study the asymptotic stability of a linear single degree-of-freedom oscillator with viscous and fractional damping. We prove that the total mechanical energy, including the stored energy in the fractional element, is a Lyapunov functional with which one can prove stability of the equilibrium. Furthermore, we develop a strict Lyapunov functional for asymptotic stability, thereby opening the way to a nonlinear stability analysis beyond an eigenvalue analysis. A key result of the paper is a Lyapunov stability condition for systems having negative viscous damping but a sufficient amount of positive fractional damping. This result forms the stepping stone to the study of Hopf bifurcations in fractionally damped mechanical systems. The theory is demonstrated on a stick-slip oscillator with Stribeck friction law leading to an effective negative viscous damping.
APA, Harvard, Vancouver, ISO, and other styles
4

Jafari Kang, Saeed, Esmaeil Dehdashti, Vahid Vandadi, and Hassan Masoud. "Optimal viscous damping of vibrating porous cylinders." Journal of Fluid Mechanics 874 (July 9, 2019): 339–58. http://dx.doi.org/10.1017/jfm.2019.457.

Full text
Abstract:
We theoretically study small-amplitude oscillations of permeable cylinders immersed in an unbounded fluid. Specifically, we examine the effects of oscillation frequency, permeability and shape on the effective mass and damping coefficients, the latter of which is proportional to the power required to sustain the vibrations. Cylinders of circular and elliptical cross-sections undergoing transverse and rotational vibrations are considered. The dynamics of the fluid flow through porous cylinders is assumed to obey the unsteady Brinkman–Debye–Bueche equations. We use a singularity method to analytically calculate the flow field within and around circular cylinders, whereas we introduce a Fourier-pseudospectral method to numerically solve the governing equations for elliptical cylinders. We find that, if rescaled properly, the analytical results for circular cylinders provide very good estimates for the behaviour of elliptical ones over a wide range of conditions. More importantly, our calculations indicate that, at sufficiently high frequencies, the damping coefficient of oscillations varies non-monotonically with the permeability, in which case it maximizes when the diffusion length scale for the vorticity is comparable to the penetration length scale for the flow within the porous material. Depending on the oscillation period, the maximum damping of a permeable cylinder can be many times greater than that of an otherwise impermeable one. This might seem counter-intuitive at first, since generally the power it takes to steadily drag a permeable object through a fluid is less than the power needed to drive the steady motion of the same, but impermeable, object. However, the driving power (or damping coefficient) for oscillating bodies is determined not only by the amplitude of the cyclic fluid load experienced by them but also by the phase shift between the load and their periodic motion. An increase in the latter is responsible for the excess damping coefficient of vibrating porous cylinders.
APA, Harvard, Vancouver, ISO, and other styles
5

Guo, Yan, Wen Guang Liu, Jian Zhang, and Wen Fu He. "Wind-Induced Vibration Control and Analysis of Super High-Rise Structure Using Viscous Damping Walls." Applied Mechanics and Materials 488-489 (January 2014): 647–51. http://dx.doi.org/10.4028/www.scientific.net/amm.488-489.647.

Full text
Abstract:
The wind-induced vibration control and analysis of a super high-rise structure located in the area of strong typhoon with viscous damping walls is introduced. Mechanical properties and design method of viscous damping wall are described, and then the arrangement scheme is put forward. The performances of structure with and without viscous damping walls under the condition of basic wind strength encountered once for 10 years are investigated in detail. The results show that the control scheme can dissipate energy of wind-induced vibration, attenuate structural dynamic response and reduce the mutation of acceleration along height direction effectively. The maximum peak acceleration can be reduced by 23.5% to 0.241m/s2, which meets 0.25m/s2 limit value stated by Technical specification for concrete structures of tall building. Therefore, the arrangement scheme is feasible and effective to control wind-induced vibration and improve structural safety and comfort.
APA, Harvard, Vancouver, ISO, and other styles
6

Huang, Xiao, Hong Ping Zhu, and Zhi Xiang Hu. "An Improved Contact Model for Pounding Simulation of Base-isolated Highway Bridge." Advanced Materials Research 243-249 (May 2011): 3775–80. http://dx.doi.org/10.4028/www.scientific.net/amr.243-249.3775.

Full text
Abstract:
A modified Hertz model with nonlinear damping (Hertz damp model) is proposed for capturing the seismic pounding response of adjacent structures. Relevant parameters in the model are theoretically derived and numerically verified. Then, this model is used to simulate pounding response of a base-isolated highway bridge subjected to near fault ground motions. At the same time, nonlinear viscous dampers are installed between bridge decks for pounding prevention. The appropriate damping coefficient of the dampers can be found by parametric studies. It is shown that nonlinear viscous dampers are effective in reducing the relative displacement between bridge decks. At last, the hysteresis curve, the maximal damper force and stroke are used to demonstrate the behavior of nonlinear viscous dampers. The results indicate that satisfied viscous dampers can be produced to eliminate pounding according to the current manufacturing skills.
APA, Harvard, Vancouver, ISO, and other styles
7

Deng, Rui, Wenyang Duan, Shan Ma, and Yong Ma. "Numerical Research of the Viscous Effect of the Bilge Keel on the Damping Moment." Polish Maritime Research 22, s1 (2015): 67–74. http://dx.doi.org/10.1515/pomr-2015-0035.

Full text
Abstract:
Abstract Bilge keels are effective passive devices in mitigating the rolling motion, and the usage of them covers almost all the sea going vessels. This paper focuses on the viscous effect of the bilge keel, ignored the effect of the free surface and the effect of the ship hull, for the general viscous characteristic of the bilge keel. In order to investigate the viscous effect of the bilge keel on the total damping moment, a special 2 dimensional numerical model, which includes a submerged cylinder with and without bilge keels, is designed for the simulation of forced rolling. Three important factors such as bilge keels width, rolling periods, as well as maximal rolling angles are taken into account, and the viscous flow field around the cylinder is simulated by some codes based on the viscous method in different conditions, in which the three factors are coupled. Verification and validation based on the ITTC method are performed for the cylinder without bilge keels in the conditions of different rolling periods and maximal rolling angles. The primary calculation of damping moment induced by the cylinder with 0mm, 4mm, and 10mm width bilge keels shows some interesting results, and a systematic analysis is conducted. The analysis of the damping moment components suggests there is phase difference between the damping moment induced by the cylinder and the bilge keels, and when the bilge keels width reaches a special size, the total damping moment is mitigated. The calculation of the damping moments induced by the cylinder with some larger bilge keels are also performed, and the results suggest that, the damping moment induced by the bilge keels is increased rapidly and becomes the dominant part in the total damping moment while the width of the bilge keels are increased, but the damping moment induced by the cylinder is not changed significantly. Some illustration of the vortices formation and shedding is included, which is the mechanism of the damping moment caused by the bilge keels. The present work shows an interesting problem, and it is useful for the bilge keel design.
APA, Harvard, Vancouver, ISO, and other styles
8

Losanno, D., J. M. Londono, S. Zinno, and G. Serino. "Effective damping and frequencies of viscous damper braced structures considering the supports flexibility." Computers & Structures 207 (September 2018): 121–31. http://dx.doi.org/10.1016/j.compstruc.2017.07.022.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Yi, Jiang, Jianzhong Li, and Zhongguo Guan. "Shake Table Studies on Viscous Dampers in Seismic Control of a Single-Tower Cable-Stayed Bridge Model under Near-Field Ground Motions." Journal of Earthquake and Tsunami 12, no. 05 (2018): 1850011. http://dx.doi.org/10.1142/s1793431118500112.

Full text
Abstract:
To investigate the effectiveness of viscous damper on seismic control of single-tower cable-stayed bridges subjected to near-field ground motions, a 1/20-scale full cable-stayed bridge model was designed, constructed and tested on shake tables. A typical far-field ground motion and a near-field one were used to excite the bridge model from low to high intensity. The seismic responses of the bridge model with and without viscous dampers were analyzed and compared. Both numerical and test results revealed that viscous dampers are quite effective in controlling deck displacement of cable-stayed bridges subjected to near-field ground motions. However, due to near-field effects, viscous damper dissipated most energy through one large hysteresis loop, extensively increasing the deformation and damping force demand of the damper. Further study based on numerical analysis reveals that to optimize deck displacement of cable-stayed bridges during an earthquake, a viscous damper with relatively larger damping coefficient should be introduced under near-field ground motions than far-field ones.
APA, Harvard, Vancouver, ISO, and other styles
10

Ibrahim, R. A., and G. Latorre. "Experimental Investigation of Dynamic Parameters of Viscous Fluids in Unsteady Flow." Journal of Pressure Vessel Technology 110, no. 1 (1988): 29–35. http://dx.doi.org/10.1115/1.3265564.

Full text
Abstract:
The main objective of this paper is to conduct a series of experimental investigations to measure the effective mass moment of inertia and damping coefficient of a viscous fluid due to an immersed rod fitted in a circular cylindrical container which experiences roll oscillations. This work is mainly oriented to the dynamic analysis of liquid propellant rockets. The measured results are used to examine the validity of the solution of the linearized Navier-Stokes equations. It is shown that the liquid inertia and damping are dependent upon the tank roll frequency and fairly agree with the predicted analytical results.
APA, Harvard, Vancouver, ISO, and other styles
More sources
You might also be interested in the extended bibliographies on the topic 'Effective viscous damping' for particular source types:
Journal articles
We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!

To the bibliography