【作者】 杜林平；

【导师】 孙树民；

【作者基本信息】 华南理工大学 ， 船舶与海洋结构物设计制造， 2011， 硕士

【摘要】 磁流变阻尼器是一种很有发展前景的减小地震作用的阻尼器,它具有能耗低、出力大、响应速度快、结构简单、阻尼力连续顺逆可调、价格便宜、并可方便地与微机控制结合等优良特点。许多学者研究表明,采用恰当控制律的磁流变阻尼结构,在地震中能取得很好的控制效果。本文将磁流变阻尼器应用于柔性底层结构的振动控制中,主要完成了以下工作:(1)为了能最大限度的发挥磁流变阻尼器的优点及评价磁流变阻尼器在结构振动控制中的效果,本文详细介绍了磁流变阻尼器已有的几种理想化的磁流变阻尼器模型。(2)为了更好的应用磁流变阻尼器进行振动控制,本文详细推导了经典线性二次型最优控制算法和线性二次型Gauss最优控制算法。(3)磁流变半主动控制技术的发展为磁流变阻尼器在结构振动控制领域的应用奠定了基础,本文介绍了各种磁流变半主动控制算法,并将限界Hrovat磁流变阻尼控制算法应用于柔性底层结构的振动控制中。(4)采用限界Hrovat最优控制算法对柔性底层结构地震反应进行半主动控制分析研究,并且与结构的无控和主动控制效果进行了比较,算例表明,磁流变阻尼器能够有效地控制柔性底层结构在地震作用下的位移反应。更多还原

【Abstract】 MR damper is one of the most promising control devices for civil engineering applications to earthquake hazard mitigation, because they have many advantages such as small power requirement reliability and low price to manufacture. Many scholars’study show that applying the proper control law of magneto-rheological damping structure can obtain very good control effect in the earthquake.In this paper, MR Damper is used in vibration control of soft first Structures. The following work is done:(1) To develop control algorithms that take maximum advantage of the unique features of the damper and to evaluate its effectiveness for structural control applications, in this paper, a review of several idealized mechanical models for fluid damper is detailedly presented.(2) In order to promote the application of MR damper in vibration control, Linear Quadratic Regulator control Algorithm and linear Quadratic Gaussion control Algorithm are detailedly derived in this paper.(3) The development of magneto-rheological semi-active control technology which has laid a foundation for the application of MR damper in vibration control of structures.(4) the analytical researches are done on the semi-active control of seismic response to structure with limiting gauge Hrovat optimal control algorithm, and the results of semi-active control are compared with the results of no control and active control of structure. It is shown through a calculation sample that the MR damper does have good control effect on the seismic response of the structures with the soft first story.更多还原