Topic
Damping ratio
About: Damping ratio is a research topic. Over the lifetime, 4869 publications have been published within this topic receiving 63192 citations.
Papers published on a yearly basis
Papers
More filters
TL;DR: In this paper, a method is presented to obtain a non-proportional (non-viscous) viscous damping matrix from complex modes and complex natural frequencies.
261 citations
TL;DR: In this article, two output-only time-domain system identification methods are employed to obtain dynamic characteristics of a suspension bridge, namely, the Random Decrement Method combined with the Ibrahim Time Domain (ITD) method and the Natural Excitation Technique (NExT) combined with Eigensystem Realization Algorithm (ERA).
259 citations
TL;DR: In this article, simply supported beams were tested using a free vibration method to determine the relationships between damping ratio in small deformation and the size as well as amount of rubber particles in rubberized concrete.
258 citations
TL;DR: In this paper, the authors describe damping ratio characteristics of steel-framed buildings and reinforced concrete (RC/SRC) buildings based on analyses of the database, including effects of several building factors.
Abstract: Full-scale data on damping of buildings in Japan have been collected by the Damping Evaluation Committee of the Architectural Institute of Japan. Reliable data on 137 steel-framed buildings, 25 reinforced concrete (RC) buildings, 43 steel-framed reinforced concrete (SRC) buildings have been compiled in a database. Most of these data have been evaluated from vibration tests in a small amplitude region. This paper describes damping ratio characteristics of steel-framed buildings and RC/SRC buildings based on analyses of the database, including effects of several building factors. It is shown that the higher the building, the smaller the first-mode damping ratio. Furthermore, the damping ratios seem to be affected by building use: Those of hotels and apartments are generally larger than those of other buildings. However, damping ratios are more widely scattered than natural periods, because they are also affected by vibration amplitude, foundation type, and so on. Frequency and amplitude dependencies of damp...
257 citations
TL;DR: In this article, the damped free vibration of a system composed of a magnetorheological elastomer and a mass was tested in order to obtain the dependence of the natural frequency and the damping ratio of the structure on the applied magnetic field.
Abstract: This paper presents an experiment testing the damped free vibration of a system composed of a magnetorheological elastomer and a mass. The goal of this experiment was to obtain the dependence of the natural frequency and the damping ratio of the structure on the applied magnetic field. The shear properties, including the shear storage modulus and the damping factor, were therefore determined. The experimental results revealed that the shear storage modulus could reach a value of 60% of the zero-field modulus and was dominated by the magnetic field, but the change in the damping factor could be neglected. Furthermore, when the field was moderate and saturation did not occur, the shear storage modulus increased proportionally with the applied field. This interesting phenomenon was analysed, and it is suggested that the subquadratic field dependence, which arises from the saturation of the magnetization near the poles of closely spaced pairs of spheres, must be taken into consideration.
250 citations