基于GNSS-RTK技术的超高层建筑动态特性  

Dynamic characteristics of super high-rise buildings based on GNSS-RTK technology

作　　者：夏杨玲 牛彦波[2] XIA Yangling;NIU Yanbo(China Communications Guangzhou Waterway Bureau Ltd.,Guangzhou 510221,China;School of Civil Engineering,Tianjin University,Tianjin 300350,China)

机构地区：[1]中交广州航道局有限公司,广州510221 [2]天津大学建筑工程学院,天津300350

出　　处：《导航定位学报》2020年第3期92-99,共8页Journal of Navigation and Positioning

摘　　要：为进一步提高超高层建筑变形监测的精度,提出1种联合去噪的方法:分析实时动态差分(RTK)工作模式下全球卫星导航系统(GNSS)传感器背景噪声分布特性;提出利用切比雪夫滤波与自适应噪声完备集合经验模态分解的算法联合去噪,以削弱传感器背景噪声的影响,提高其监测精度;然后采用快速傅里叶变换与随机减量技术,从去噪信号中提取结构的模态信息(固有频率与阻尼比)。实验结果表明,这种方法获得的结果与结构的3维有限元模型分析结果吻合较好,说明GNSS-RTK技术可有效应用于超高层建筑的变形监测中。In order to further improve the deformation monitoring accuracy of super high-rise buildings,the paper proposed a combined de-noising method:the distribution characteristics of the background noise of GNSS-RTK sensors were analyzed;and the algorithms of Chebyshev filtering and complete ensemble empirical mode decomposition with adaptive noise(CEEMDAN)were combined to remove the noise for reducing the influence of background noise of sensors and advancing the monitoring accuracy;then the modal information(i.e.natural frequency and damping ratio)of the structure was extracted from the denoised signal via using fast Fourier transform and random decrement technique fianlly.Experimental result showed that the analytical output of the proposed method would coincide with that of three-dimensional finite element model of the structure,which indicated that GNSS-RTK technology could be efficiently applied in the deformation monitoring of super high-rise buildings.

关 键 词：全球卫星导航系统 实时动态差分 超高层建筑 联合去噪 结构的模态信息提取 动态特性 

分 类 号：P228[天文地球—大地测量学与测量工程]