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Proceedings Paper

Analysis of nonlinear damping using quadrature spectrum
Author(s): Xingen Dong
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Paper Abstract

Energy loss per cycle is one of the most common parameters to determine the magnitude of hysteresis damping. The measured hysteresis loops for materials during dynamic measurements are often irregular and general equations for defining the force- displacement-time relations of materials are unavailable in almost all cases. In order to analyze the complicated nature of the behavior of nonlinear hysteresis damping under non- sinusoidal loading, a new method was developed by the author for the damping characterization of materials subjected to any arbitrary dynamic loading. This method uses quadrature spectrum of displacement and restoring force signals to calculate the damping properties of materials at any frequency. It was proven that the quadrature spectrum method is an excellent tool for practical hysteresis damping measurement. The dynamic damping density function was also defined and discussed in this paper.

Paper Details

Date Published: 31 March 1998
PDF: 7 pages
Proc. SPIE 3396, Nondestructive Evaluation of Materials and Composites II, (31 March 1998); doi: 10.1117/12.301536
Show Author Affiliations
Xingen Dong, Southwest Research Institute (United States)

Published in SPIE Proceedings Vol. 3396:
Nondestructive Evaluation of Materials and Composites II
Steven R. Doctor; Carol A. Nove; George Y. Baaklini, Editor(s)

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