【作者】 邸龙；

【导师】 赵鸿铁；

【作者基本信息】 西安建筑科技大学 ， 防灾减灾及防护工程， 2003， 硕士

【摘要】 结构振动控制是一种新型的抗震技术，其中半主动控制是介于被动控制与主动控制之间的一种控制技术，其仅需少量外加能源，便可产生接近主动控制的效果。由智能材料磁流变体制成的磁流变阻尼器不仅具有结构简单，体积小，反应快，能耗小和阻尼力连续顺逆可调等优点外，而且还易于和计算机相结合。在半主动控制下，磁流变阻尼器可以有效地减小建筑结构的风振和地震反应。因此，国内外已经有越来越多的学者投入到此方面的研究中来，并已取得了一定的成果，但在磁流变阻尼器的力学模型和磁流变阻尼结构的分析与设计方面仍然存在着许多问题，有待于进一步解决和完善。 本文以提出一个新的且简单准确的磁流变阻尼器的力学模型，并建立一套关于磁流变阻尼结构的分析方法和设计方法为目的，主要完成了以下工作： (1)磁流变阻尼器的力学模型 在了解和掌握用于分析磁流变阻尼器力学特性的几种力学模型的基础上，提出了一个新的，形式较为简单且能较为准确地反映阻尼器力学特性的Sigmoid模型，并且将几种模型进行了对比分析。 (2)磁流变阻尼结构的弹塑性地震反应分析 对实际结构的恢复力模型按三线型刚度退化模型考虑，磁流变阻尼器采用作者所提出的Sigmoid模型，对在半主动全态和半主动双态控制下的磁流变阻尼结构进行了弹塑性地震反应分析和对比分析，并得出了相应的结论。 (3)磁流变阻尼结构的优化分析 在既定的优化目标下利用时程分析方法对磁流变阻尼结构进行优化分析，且得出了优化布置结果。并给出计算实例，编制了相应的计算程序。 (4)磁流变阻尼结构的设计方法 本文的创新之处在于： (1)提出了一个新的磁流变阻尼器力学模型——Sigmoid模型。 西安建筑科技大学硕士学位论文（2）在半主动控制下，按作者所提出的力学计算模型模拟磁流变阻尼器，原结构按三 线型刚度退化模型考虑，建立了一套关于磁流变阻尼结构的弹塑性分析方法。（3）利用设定优化目标对磁流变阻尼器及其结构进行优化。（4）提出了磁流变阻尼结构的设计方法。更多还原

【Abstract】 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 magnetorheological 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 advancing a new, simple and accurate mechanical model and establishing analysis design method about magnetorheological structure. The following work is done:(1) The mechanical model of the magnetorheological damper.Base on several mechanical models which are used to analyze the mechanical abilities of MRD a new, simple and accurate mechanical mode梥igmoid is advanced. These kinds of mechanical models which are used to analyze the mechanical abilities of MRD are compared.(2) The elastic-plastic seismic response analysis about the magnetorheological structure.The elastic-plastic seismic response analysis and compared analysis of the magnetorheological structure are carried with semi-active bi-state and foil-state control strategy when structure is simulated by three fold line stiffness retrograde model and MRD is simulated by sigmoid model, and corresponding conclusions are given.(3) The optimum analysis about the magnetorheological structure.Under the fixed optimum goal, the optimum design of the magnetorheological structure is carried by using the method of time-history analysis. An example is given and corresponding calculating program is made.(4) The design method about the magnetorheological structure.In this paper, groundbreaking theories are shown in the following:(a) The new mechanical model of the magnetorheological damper梥igmoid model is advanced.(b) The elastic-plastic dynamic response analysis about the magnetorheological structure is carried with semi-active control strategy.(c) The optimization about the magnetorheological structure is analyzed by using optimum goal.(d) The design method about magnetorheological structure is proposed.更多还原