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Analysis on the Dynamic Characteristics of a Rubber Mount Considering Temperature and Material Uncertainties  

Lee, Doo-Ho (동의대학교 기계공학과)
Hwang, In-Sung (동의대학교 기계공학과)
Publication Information
Journal of the Computational Structural Engineering Institute of Korea / v.24, no.4, 2011 , pp. 383-389 More about this Journal
Abstract
In this paper, a statistical calibration method is proposed in order to identify the variability of complex modulus for a rubber material due to operational temperature and experimental/model errors. To describe temperature- and frequency-dependent material properties, a fractional derivative model and a shift factor relationship are used. A likelihood function is defined as a product of the probability density functions where experimental values lie on the model. The variation of the fractional derivative model parameters is obtained by maximizing the likelihood function. Using the proposed method, the variability of a synthetic rubber material is estimated and applied to a rubber mount problem. The dynamic characteristics of the rubber mount are calculated using a finite element model of which material properties are sampled from Monte Carlo simulation. The calculated dynamic stiffnesses show very large variation.
Keywords
rubber mount; material uncertainty; variability analysis; statistical calibration method; dynamic stiffness analysis;
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