Analytical study on damping performances of magnetorheological grease damper based on disk squeeze mode and experimental test

Abstract

In this paper, a small displacement-type magnetorheological grease (MRG) damper based on disk squeeze mode is proposed. The squeeze flow differential equation is obtained. The Navier slip condition is considered on the surfaces and the boundary compatible condition is established. The radial velocity profiles and the radial pressure distributions are derived respectively, and the mathematical stress expression is calculated. To verify rationality of analytical method, the MRG damper is designed and fabricated according to the technical requirements of an engine vibration isolation system. The experimental damping force from MTS870 Electro-hydraulic Servo with sine wave excitation shows that the proposed analytical method is feasible and provides the reference value for designing MRG damper based on disk squeeze mode.

Key words： magnetorheological grease (MRG); damper; squeeze model

Acknowledgments

The research was supported primarily by the National Natural Science Foundation of China (Grant No. 50975298). Additional support was given by the China Postdoctoral Science Foundation (No. 200902287), the Doctoral Fund of the Ministry of Education of China (No. 20100191110010), and the Chongqing Scientific and Technological Project of China (No. 2009AC3079).

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