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Mechanical Model for Creep Performance Testing and Analysis of Polyurethane Isolator

SHU Li-hong;HE Lin;

2012, 32 (2): 147-150. DOI: 10.3969/j.issn.1006-1355-2012.02.036

Abstract （1405）

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A generalized mechanical model for polyurethane and rubber isolators analysis based on Zener components was presented. The parameters related to the creep characteristics of the isolators could be extracted readily with genetic algorithm from the step-loading process as well as from the non-ideal loading process. Seven polyurethane and rubber isolator specimens were tested and their model parameters were obtained through the analysis of the testing data. Results from the computation and testing show that the presented model can predict the creep characteristics of the polyurethane and rubber vibration isolators with high accuracy.

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《Experimental Study on the Performance of MR Damper》

SHU Li-hong;WANG Yu-fei

2010, 30 (3): 5-8. DOI: 10.3969/j.issn.1006-1355.2010.03.002

Abstract （2109）

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Based on the working principle and the simplified model of MR damper, a series of experimental study on the damper force, energy dissipation and the response time under different excitation amplitude, frequency and control current is performed. The results indicate that the MR damper has a high effectiveness for energy dissipation, and the energy dissipation increases with the increasing of the excitation amplitude, frequency and control current. The response time of the MR damper does not change obviously with the control current changing, but decreases rapidly with the increase of vibration speed.

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《Investigation on Electromagnetic Coils of Multistage Pistontype MR Damper》

WANG Yu-fei;SHU Li-hong;HE Lin

2010, 30 (2): 142-145. DOI: 10.3969/j.issn.1006-1355.2010.02.142

Abstract （2161）

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In this paper, the advantages of multistage pistontype MR damper are analyzed. The characteristics of the electromagnetic coils are systematically investigated. The simulation model for the MR damper is established and analyzed by means of the finite element software of Maxwell. From the model analysis, it is shown that to raise the utilization rate of the magnetic circuit, the electromagnetic coils in the damper should be connected in parallel form and conducted with inverse current. In order to improve the distribution of magnetic flux and guarantee the uniform distribution of magnetic induction in the dampers gap, the effective length in the magnetic circuit should be adjusted and trapezoidal shaped section for the piston alveolar should be adopted.