The Application Research On Vibration Reduction Of Frame Structure Based On Magnetorheological Fluid Damper

Structural Vibration Control is a multidisciplinary cross subjects, and it can effectively reduce response of Structural Vibration by earthquake. It has mainly the following aspects active control,Passive control,Semi-active control and mixture control. Semi-active control only requires small external Power source and can Produce control results of active control. Application on MR damper was the new generation of control element for Semi-active control. The advantages of Application on MR are not only simple structure,small volume,quick respond, small power requirement and adjustable damp forces, but also easily combine with computers. So it has a cheerful prospect in the field of Structural Vibration Control.The article firstly give a brief introduction about the theory of structure vibration control, magnetorheological fluids and magnetorheological damper, then, based on the summary about damper′s mechanical model, give characterristic analysis about magnetorheological damper used Bingham model proposed by Stanway,and do the research on the magnetorheological damper algorithm. By applying intelligent control of fuzzy control and reference to the basic principles of fuzzy controller and using Matlab software, the article designed the fuzzy controller for the example in this article. To verify the effectiveness of vibration of the magnetorheological damper in the structure,give a analysis structure vibration characteristics based on magnetorheological damper, by programming the relevant Matlab procedures and making the magnetorheological damper as semi-active control,making simulation analysis on a seven-story frame. Comparing maximum displacement and acceleration response of the original structure and the structure added the magnetorheological damper under the effect of El Centro wave, Taft wave and Tianjin wave. The simulation shows the feasibility of the magnetorheological damper for structural vibration control and provides some theoretical basis for the seismic design of structures.