A study on thermal coupling damping characteristics of magnetorheological dampers with inner channels

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Journal of Vibration and Shock ›› 2018, Vol. 37 ›› Issue (16) : 172-176.

ZHU Shisha1,HUANG Pengcheng2,TANG Libo3,ZHANG Dai2

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Abstract

The damping characteristics of the magnetorheological damper (MRD) with the inner working clearance of the piston in the thermal equilibrium are studied.The temperature of the fluid in the vehicle’s cylinder at various speeds on various road surfaces was analyzed based on the AMESim.The power curve of MRD was calculated from the angle of fluid by simulating piston vibration and coupling thermal equilibrium temperature.The damping characteristics of MRD were tested on a vibration test bed by means of constant temperature heating simulation of the thermal equilibrium temperature of the shock absorber.The results show that the vehicle’s driving speed influences the shock absorber’s damping performance.When the vehicle speed is 40 km/h, 70 km/h, and 110 km/h, the MRD’s damping performance is decreased by 9.4%, 16.67% and 20.69%, respectively.The test results are basically consistent with the simulation results.

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MRD / thermal coupling / thermal equilibrium / damping characteristics

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ZHU Shisha1,HUANG Pengcheng2,TANG Libo3,ZHANG Dai2. A study on thermal coupling damping characteristics of magnetorheological dampers with inner channels[J]. Journal of Vibration and Shock, 2018, 37(16): 172-176

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