高耸柔性结构振动模态阻尼比参数识别仿真

Simulation of Vibration Modal Damping Ratio Parameter Identification for High-rise Flexible Structure

针对当前结构振动模态阻尼比参数识别相关方法存在识别率低等问题,结合柔性结构振动形态复杂度高等特点,提出基于ERA的高耸柔性结构振动模态阻尼比参数识别方法。通过标定相机的内外参数,使用两个相机同时对柔性结构的动态进行拍摄生成结构测点图像,采用三维动态重构方法对高耸柔性结构振动情况进行预处理,利用Harris角点检测法确定振动位移,并采集位移数据,得到模态阻尼比参数集合。基于数据采集结果,通过ERA方法对高耸柔性结构振动模态阻尼比参数进行识别。实验结果表明,上述方法具有较强的识别性能、柔性结构振动形态简单的特点。

Due to low identification rate in the current methods,a method of identifying the vibration modal damping ratio in high-rise flexible structures based on ERA was proposed.By calibrating the internal and external parameters of camera,we used two cameras to take dynamic photographs of flexible structure at the same time to generate the images of structural measures point.Then,we used the three-dimensional dynamic reconstruction method to pre-process the vibration of the high-rise flexible structure.Moreover,we used Harris corner detection method to determine the vibration displacement and collect displacement data,so as to get the parameter set of modal damping ratio.Based on the data acquisition results,we identify the vibration modal damping ratio of high-rise flexible structure by ERA method.Simulation results show that the proposed method has strong identification performance and simple vibration forms of flexible structure.