STUDY ON DESIGN THEORY FOR MAGNETO-RHEOLOGICAL FLUID DAMPER USING EYRING CONSTITUTIVE RELATIONSHIP AND EXPERIMENTAL TEST

Liao Changrong  Yu Miao  Chen Weimin

(Center for Intelligent Structures, Chongqing University, Chongqing 400044)

Zhang Honghui  Huang Shanglian

(Key Laboratory for Optoelectronic Technology & Systems of Education Ministry of China, Chongqing University, Chongqing  400044)

Abstract: According to the Bingham model parameters from experiment in laboratory, the Eyring constitutive model parameters are identified via optimization of the error function of shear stress depicted by the Bingham model and Eyring model and data curve fitting. The flow equations for magnetorheological (MR) fluids in annular channel are theoretically set up using Eyring constitutive model and velocity profile of MR fluids though annular channel is obtained. The methodologies for calculating damping force are developed. If piston velocity and annular channel geometrical parameters are given, damping performances are predicated in order to determine design parameters. In the light of technical requirements for front suspension of Chanan star minibus, a MR fluid damper, which is designed and fabricated according to design method presented, has tested by electro-hydraulic servo vibrator and it’s control system in National Center for Test and Supervision of Coach Quality. The experimental results reveal that the analysis methodology and design theory are reasonable.

Key words: MR fluid  Damper  Eyring model  Bingham model

CLC No: TF125.8

国家自然科学基金(50135030、60404014)、中国博士后基金(2004035151)和重庆市自然科学基金(048414)资助项目. Received 20041012, received in revised form 20050525