Generating line spectra from experimental responses. Part I: Relaxation modulus and creep compliance |
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Authors: | Prof I Emri Prof N W Tschoegl |
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Institution: | (1) Mechanical Engineering Department, University of Ljubljana, Murnikova 2, 61000 Ljubljana, Slovenia;(2) California Institute of Technology, 1201 East California Boulevard, 91125 Pasadena, CA, USA |
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Abstract: | We describe a recursive computer algorithm which generates line spectra from relaxation modulus or creep compliance data without producing negative spectrum lines. We apply the algorithm here to data read from mathematical models for the relaxation modulus. Since these data were thus free of the usual experimental error, we could use a relatively simple form of the basic algorithm that is applicable also to smoothed data. The spectra faithfully reproduced the input functions and may serve for data storage as well as for predicting other experimental responses. |
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Keywords: | Creep compliance line spectrum relaxation modulus relaxation spectrum retardation spectrum |
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