斜拉桥地震响应振动控制Benchmark问题研究

Benchmark control problem in the study of seismic response of cable-stayed bridges

文章建立了斜拉桥结构的有限元模型和振动控制Benchmark模型,采用LQG控制算法和最优控制理论,基于MATLAB环境的Simulink程序,对斜拉桥结构振动的主动控制以及Benchmark问题进行研究,给出了独塔双面索斜拉桥在随机干扰作用下振动控制的仿真结果。

A detailed study of structural control for a seismically excited cable-stayed bridge is presented. The goal of this paper is to develop an evaluation model and a MATLAB-based computer program for cable-stayed bridge vibration control. Based on the commercial FE software ADINA, a three-dimensional numerical model is developed to represent the complex behavior of the full-scale cablestayed bridge by means of truss and beam finite elements. Based on the LQG method, controllers were designed for the bridge. The design model is further reduced in dimension by considering only those states of the evaluation model with the largest controllability and observability. Within the MATLAB environment through a SIMULINK block, a simple control design has been made in the form of a set of MATLAB equations. The numerical simulation results of bridge vibration excited by the random excitation are presented.