基于动态GPS技术的大连北大桥结构健康测试  

Structural Health Test of Dalian Bei-Da Bridge Based on Dynamic GPS Technology

作　　者：伊晓东[1] 张传刚[2] 

机构地区：[1]大连理工大学土木水利学院,辽宁大连116024 [2]江苏省交通科学研究院,江苏南京211112

出　　处：《测试技术学报》2008年第5期392-396,共5页Journal of Test and Measurement Technology

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.

关 键 词：GPS 实时动态监测 频谱分析 自振频率 有限元 

分 类 号：TU311[建筑科学—结构工程] TP206[自动化与计算机技术—检测技术与自动化装置]