Modeling And Experimental Research Of Multi-ring Grooves Structure MR Fluid Absorber

The Magnetorheological (MR) fluid absorber is a kind of novel intelligent material device,which has a lot of advantages compare to common liquid absorber such as low power requirements, wide dynamic ranges and fast reaction. It is a typical controllable fluid absorber. For the excellent characteristics of MR fluid absorber, the study of the factors of damping force has been performed increasingly.Firstly,the piston of shock absorber with 4 different dimensions parametric was designed and manufactured. The static and dynamic experiment of the shock absorber was performed. Different characteristic dimension parameters which affected the damp force and shock rate were analyzed according to the data of experiment.Secondly, the dynamics characteristic of multi-ring grooves structure absorber using oil was analyzed. The relational expression of damper and velocity was deduced by combining with the theory of viscidity fluid. The function of the characteristic parameters (dynamics viscosity coefficientη, yield stressτy) of the MR fluid and current was carried out based on experiment. The research of the multi-ring grooves structure MR fluid absorber was performed based on Flow theory and Bingham model. The relational expression between damp force and characteristic dimension parameter of the multi-ring grooves structure MR fluid absorber was built. The accuracy of the relational expression was validated by comparing calculation result and experiment. The results obtained will be put forward to provide the references of the optimum structure of MR fluid absorber and its application.