Frequency Response and Jump Avoidance of Solid and Liquid Mixture Vibration Isolator

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Journal of Vibration and Shock ›› 2013, Vol. 32 ›› Issue (12) : 150-153.

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Frequency Response and Jump Avoidance of Solid and Liquid Mixture Vibration Isolator

X. Gao, Q. Chen, H. D. Teng

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Abstract

Solid and Liquid Mixture (SALiM) vibration isolator is a new technology on passive vibration control and its axial stiffness can approximate to be bilinear. The paper discusses the design procedures of the isolator from the view of dynamics and gives the nonlinear frequency response function (NFRF) by analytic method. First of all, the dynamic model of the vibration system should be established. Then an amendment to the first-order average method allows one to investigate the approximate solution of nonlinear system. In order to ensure validity of the analytical method, a numerical reference is provided. According to the plot of the NFRF, one can find that the jump phenomenon exists in some range. And this nonlinear phenomenon caused by piecewise linear stiffness may bring impact to equipment which should have been protected from vibration and shock. In order to avoid the emergence of the defect, the following discussion begins with the NFRF which allows one to determine the critical values of parameters, such as critical quantity of the elastic solid element.
Keywords: vibration isolation; piecewise bilinear; average method; frequency response; jump phenomenon

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vibration isolation / piecewise bilinear / average method / frequency response / jump phenomenon

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X. Gao;Q. Chen;H. D. Teng. Frequency Response and Jump Avoidance of Solid and Liquid Mixture Vibration Isolator[J]. Journal of Vibration and Shock, 2013, 32(12): 150-153