摘要
用GPS对大连北大桥进行实时动态监测,采用Matlab信号处理工具箱设计了一个9阶巴特沃斯Butterworth带通滤波器,对结构的振动时程曲线进行了滤波,将过滤后的信号按FFT(快速傅立叶变换)法进行频谱分析,便可得到桥梁结构的自振频率,并与Ansys有限元数值解进行对比,最后将监测桥梁自振频率的GPS传感器法与传统的加速度传感器法进行对比.
Dynamic GPS technology is used to act real-time monitoring on Dalian Bei-Da Bridge, and then by Matlab signal processing toolbox, a nine-order Butterworth belt-pass filter is designed to filter the curve of the structural vibration. The filtered signal spectrum is analyzed by Fast Fourier Transform （FFT） so as to get the natural frequency of the bridge structure which is compared with the numerical solutions of Ansys finite element. Finally the GPS sensor method is compared with the traditional method of acceleration sensor as well.
出处
《测试技术学报》
2008年第5期392-396,共5页
Journal of Test and Measurement Technology
关键词
GPS
实时动态监测
频谱分析
自振频率
有限元
GPS
real-time dynamic monitoring
spectrum analysis
natural frequency
finite element
