The Application Of The Magnetorheological Damper For The Building Structure

Structure vibration control is a new kind of anti-earthquake technique. Semi-active control is a kind of control technique which compromises between active control and passive control. It only requires small external power source and can produce control results of active control. The advantages of magnetorheologi--cal damper (MRD) which were made of magnetorheological fluid (MR) are not only simple structure, small volume, quick respond, small power requirement and adjustable damp forces, but also easily combine with computers. MRD with semi-active control strategy can effectively reduce structure's wind vibration and earthquake response. Thus at home and abroad more and more experts study on MRD, and acquire many achievements, but there are many problems about damper mechanical model and magnetorheological structure's analysis and design etc., so these problems require to be solved and completed.In this paper, the major aim is that establishing analysis design method about magnetorheological structure.The following work is done:First,the mechani--al model of the magnetorheological damper.Base on several mechanical models which are used to analyze the mechanical abilities of MRD a simple and accurate mechanical mode is advanced. These kinds of mechanical models which are used to analyze the mechanical abilities of MRD are compared.Second,the design and making of the MRD,Introduce the inner special on the MRD structure.Third,the control algorithm of the MRD,several control algorithm methods are rasied that are applied for the control structure,including the classic control theroy and the modern control theroy.Fouth, the optimum analysis about the magnetorheological structure. For the fixed optimum goal, the optimum design of the MRD structure is carried by using the method of time-history analysis. An example is given and corresponding calculating program is made.