Research on Measuring System for Damping Material’s Elastic Parameter with the Amplitude Fitting MethodReport as inadecuate




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The damping material because of the particular micro-structure in the vibration and noise control aspects and underwater acoustic engineering have been very widely used. Elastic damping material parameters are the basis of engineering data. Presently there has been many methods of measuring elastic parameters, but the low Young-s modulus measurement of the dynamic elastic parameters still no accepted standard method. Fitting the amplitude of longitudinal vibration of rods with a uniform theory, constructed experimental system, with polyurethane flexible rod as the research object, by measuring different frequency on every point of the longitudinal vibration amplitude distribution, and drew the amplitude curves, application of the minimum squares curve fitting the dynamic elastic parameter inversion. With the resonance method of measurement results were compared, demonstrated the feasibility of the method and stability, and the experimental results are analyzed.

KEYWORDS

Longitudinal vibration; elastic parameters; amplitude distribution; least squares; curve fitting

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Author: Cuiping Gao, Hui Sun

Source: http://www.scirp.org/



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