STUDY ON UPGRADING OF RAYLEIGH DAMPING

Trial for accuracy improvement by addition of causal hysteretic damping model

Abstract

Since it is well known that the internal damping of many materials is comparatively frequency independent, the Rayleigh damping model is often used for such kind of analyses. However, the accuracy and the availability of the model are not high. The author has studied and proposed some damping models for time domain analyses which are almost frequency independent. In this paper, a new damping model which is corresponding to the upgrade version of Rayleigh damping is proposed, based on these studies. The efficiency of the model is confirmed by applying it to example analyses.