Abstract
Abstract This paper concerns the damping in structures with emphasis on treatment of inherent uncertainty in its prediction and estimation. Material or structural damping is addressed as well as damping due to the aerodynamic and hydrodynamic forces of the fluid surrounding the structure. The reported data base on damping information is examined in light of wind sensitive structures that rely heavily on damping for their performance under winds. The basic techniques for estimation of damping from response time histories are reviewed, and the random decrement technique is considered in some detail. The implications of the uncertainty of damping on system response are analyzed in terms of a perturbtion technique, second-moment analysis and Monte Carlo simulation. Several simple illustrative examples are provided throughout the text.
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