Study on design methodology of magneto-rheological fluid Shock absorbers employing Eyring constitutive model

Abstract

In this paper, the Eyring constitutive model parameters have been identified via minimization of the error function defined as error sum between shear stresses from experimental tests in laboratory of Chongqing University and shear stresses depicted the Eyring constitutive model. Authors have theoretically set up flow control equations for magneto-rheological (MR) fluids in annular channels using the Eyring constitutive model and N-S equations in hydrodynamics. The velocity profiles of MR fluids through annular channel are obtained by means of flow control equations mentioned above. In accordance with piston velocity and annular channel geometrical parameters of MR fluid shock absorber, MR shock absorber performances have been predicated by means of analytical methodology developed in this paper. In the light of technical requirements of front suspension of Chanan star minibus, a MR fluid shock absorber, which is designed and fabricated in Chongqing University according to design method presented in this paper, has tested by electro-hydraulic servo vibrator and its control system in National Center for Test and Supervision of Coach Quality. The experimental results reveal that the analytical methodology and design theory are reasonable.