ANALYTICAL STUDY ON DAMPING PERFORMANCES OF MAGNETORHEOLOGICAL GREASE DAMPER BASED ON DISK SQUEEZE MODEL AND EXPERIMENTAL TEST

摘要

In this paper, a kind of Magnetorheological grease (MRG) damper of small displacement is put forward based on disk squeeze model. The squeeze flow differential equation is obtained. Navier slip condition is considered on the surfaces and boundary compatible condition is established. The radial velocity profile and the radial pressure distributions are derived respectively. The mathematical expression of stress is calculated. In order to verify rationality of analytical method, MRG damper is designed and produced according to technical requirements of engine vibration isolation system. The experimental damping force from MTS870 Electro-hydraulic Servo with sine wave excitation in accordance with theoretical value, which shows that analytical methods proposed in this paper is feasible and has the reference value to design MR grease damper based on the disk squeeze mode.