Modeling and parameter identification of amplitude-and frequency-dependent rubber isolator

Abstract：A model to describe the hysteresis damping characteristic of rubber material was presented. It consists of a parallel spring and damper, whose coefficients change with the vibration amplitude and frequency. In order to acquire these relations, force decomposition was carried out according to some sine vibration measurement data of nonlinear forces changing with the deformation of the rubber material. The nonlinear force is decomposed into a spring force and a damper force, which are represented by the amplitude- and frequency-dependent spring and damper coefficients, respectively. Repeating this step for different measurements gives different coefficients corresponding to different amplitudes and frequencies. Then, the application of a parameter identification method provides the requested approximation functions over amplitude and frequency. Using those formulae, as an example, the dynamic characteristic of a hollow shaft system supported by rubber rings was analyzed and the acceleration response curve in the centroid position was calculated. Comparisons with the sine vibration experiments of the real system show a maximal inaccuracy of 8.5%. Application of this model and procedure can simplify the modeling and analysis of mechanical systems including rubber materials. 作者： Author： SUN De-wei[1]  CHEN Zhi-gang[1]  ZHANG Guang-yu[1]  P.Eberhard[2] 作者單位： School of Mechatronics Engineering,Harbin Institute of Technology,Harbin 150001,ChinaInstitute of Engineering and Computational Mechanics,University of Stuttgart,Stuttgart 70569,Germany 期 刊： 中南大學學報（英文版）   EISCI Journal： JOURNAL OF CENTRAL SOUTH UNIVERSITY OF TECHNOLOGY(ENGLISH EDITION) 年，卷(期)： 2011, 18(3) 分類號： U262.11 Keywords： rubber isolator    modeling    parameter identification    hysteresis damping    dynamic analysis    機標分類號： TM2 TP3 機標關鍵詞： identification of    different    dynamic characteristic    application    identification method    spring    mechanical systems    centroid position    measurement data    response curve    shaft system    real system    modeling    relations    In order    changing    analysis    forces    step 基金項目： The National Natural Science Foundation of China

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