The Design of a New-Style Composite MR Damper and Magnetic Circuit Simulation Analysis

A new-style composite MR damper for the semi-active control system of civil engineering is designed in this paper.The character of MR damper,the energy consumption of control system,the security and stability of the damper are investigated.The new-style damper has advantages of passive and semi-active control,and its mechanical model is also established.Based on the theory of electromagnetism,MR damper's magnetic circuit which is in the simultaneous function of permanent magnet and electrifying loop is designed.The simulation analysis for the magnetic circuit and structural parameter of MR damper is carried out by using software ANSYS.Results show that the composite MR damper has more advantages in system controllability,security and stability than those tradifimal MR dampers,and provides an effective means for the composite MR damper design with an appropriate force.