Abstract: Based on the principle of squeeze-flow mode magnetorheological (MR) fluid isolator, damper force equation of the isolator is deduced. According to the MR fluid viscosity without magnetic field and other enactment parameters, the damper force-speed relationship and damper force-displacement relationship are respectively gotten. Moreover, the integrate affects of damper forces by displacement, speed, acceleration,coil current are discussed. Those calculations and analysis are very useful for father research of MR vibration isolator.

Key words: Magnetorheological fluid Damper force, Squeeze mode Vibration isolator