【作者】 曾德惠；

【导师】 黄松和；

【作者基本信息】 西南交通大学 ， 机械设计及理论， 2008， 硕士

【摘要】 结构振动控制是提高结构抗震能力的有效途径,它通过在结构上安装控制装置,由控制装置与结构共同抵御地震动等动力荷载,保证结构的动力响应限定在预定的设计范围内。结构控制方法一般分为被动控制、主动控制、半主动控制和混合控制等。振动控制装置大量采用了液压元件及液压技术来实现,比如:粘滞流体阻尼器的被动控制;半主动粘滞流体阻尼器的半主动控制、电液伺服作动器的主动控制,等等。本文讨论了振动控制系统仿真的一系列问题,包括:振动控制系统动力学方程的建立及求解、振动控制的流程及算法、MATLAB程序仿真及Simulink仿真方法的运用等等。以一连续梁桥为计算模型,对该桥梁提出了主动控制电液伺服作动器的设计方案、确定了作动器的主要参数及相关液压元件的选择,利用神经网络建立了作动器的逆向模型,成功地解决了作动器的逆向模型建立难的问题。在建立被动、主动、半主动控制系统Simulink仿真模型的基础上,对桥梁的粘滞流体阻尼器以及电液伺服作动器控制系统作了仿真分析,仿真结果表明:主动控制下,桥梁的位移、速度、加速度反应都得到了有效控制;而粘滞流体阻尼器的被动控制,只要合理设置阻尼器的安装位置,对桥梁位移反应都能达到较好的控制。更多还原

【Abstract】 The structure vibration control is the efficient measure for structural seismic control. By installing control devices in the structure, dynamic loads including seismic motion can be resisted, seismic dynamic response of structures can be kept in the design range. In general, the structure control methods involve passive control, active control, semi-active control and hybrid control and so on.Hydraulic component and hydraulic technique are widely used in the vibration control device, such as the viscous fluid damper, the semi-active viscous fluid damper, and the electro-hydraulic servo actuator.In this paper, a series of questions about structural seismic response control are discussed, these questions include the dynamic model of structure seismic vibration control system, the structure vibration control flow and algorithm, the application of Simulink platform and MATLAB procedure. The computation model of a continuous bridge is taken, the design scheme of a electro-hydraulic servo actuator is put forward with hydraulic technique relevant knowledge, the actuator’s main parameter and the related hydraulic element are determined, the actuator’s forward simulation model and backward neural network model are established. Based on the Simulink simulation models of the passive control system, the active control system and the semi-active control system, the simulation analysis for a bridge by using viscous fluid dampers and a electro-hydraulic servo actuators are made. The simulation results show the displacement, velocity and acceleration reaction of the bridge can be effectively controlled with active control strategy and the displacement reaction of the bridge can be controlled with reasonable installation site of viscous fluid dampers.更多还原