Study on Mechanical Properties of Energy-Dissipating Damper Based on MRE and Semi-active Control Analysis
A new type of energy dissipation damper based on MRE is proposed according to the adjustable me-chanical properties of magnetorheological elastomer(MRE)..The seven-story frame structure with MRE damper on each floor is modeled and simulated by Matlab/Simulink,and the passive control is compared with the classical linear optimal control and sequential optimal control based on semi-active control strategy.The me-chanical test results show that under the action of 0～500 mT magnetic induction intensity,the change of shear modulus of MRE reaches 132.43 kPa,and the magnetorheological effect is increased by approximately 274%.The increase of loading amplitude and loading rate can improve the mechanical properties of MRE damper,and the equivalent stiffness and damping of the damper can be continuously adjusted during the increase of current ex-citation from 0 to 10 A.The simulation results show that the semi-active control system based on the MRE damper can effectively reduce the response of the structure under seismic action,and all three methods can con-trol the dynamic response.Among them,the sequential optimal control algorithm has the most significant con-trol effect and higher accuracy.In addition,the system needs to consider the influence of various factors in the ac-tual test to minimize the error.
dampervibration controlmagnetorheological elastomervariable stiffness and dampingsemi-active control strategy
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