A Review of Methods of Equivalent Damping Estimation From Experimental Data

Abstract

The computational problems associated with the estimation of damping, particularly in piping systems, is discussed in detail and appropriate procedures are recommended to minimize their impact. The theoretical background and the related basic assumptions in each of these methods is given first in order that the approximations introduced in practical problems is better understood. This understanding then leads to alternative procedures where more adequate and useful results are expected. The objective of this effort is to help homogenize the existing damping data by the use of systematic procedures and hence to reduce the variability of damping estimates in piping systems.

Vibration Analysis for Damage Detection in Metal-to-Metal Adhesive Joints

“…There exist several methods to estimate MD [23], though the accuracy of these estimates can vary with the method of measurement [24]. Simpler methods (e.g., the half power points method [25]) are more restrictive in their underlying assumptions and require less computational effort.…”

Non-destructive evaluation of metal-to-metal adhesive joints using vibration analysis: experimental results

“…There exist several methods to estimate MD [16], though the accuracy of these estimates can vary with the method of measurement [17]. In the freedecay envelope method [18], MD is estimated from the decay envelope of system response.…”