| 特长钢箱梁桥GPS监测数据的奇异谱分析 |
| |
| 引用本文： | 汤同旭,岳东杰.特长钢箱梁桥GPS监测数据的奇异谱分析[J].测绘工程,2017,26(8). |
| |
| 作者姓名： | 汤同旭 岳东杰 |
| |
| 作者单位： | 河海大学 地球科学与工程学院,江苏 南京,210098 |
| |
| 摘 要： | 实时准确地监测和分析大型建筑物的变形对于大型建筑物的施工与运行是十分重要的。奇异谱分析(SSA)是一种与经验正交函数相关联的一种统计技术。文中采用奇异谱分析(SSA)的方法,结合功率谱峰值与原序列和RC1-2重建序列均方误差最小的方法确定最优潜入维数M,研究了特长钢箱梁桥索塔的变形趋势和震荡周期。小波分析技术也可以很好地描述时间序列的时频分布,但SSA重构后的结果比小波要平滑些,更能反映出时间序列的特征。结合苏通大桥北索塔监测序列表明,北索塔站的N,E,U方向上均存在明显的趋势和显著的变动周期,而且也含有较多的噪声信息。
|
| 关 键 词： | 奇异谱 潜入维数 变形监测 特征信息 小波分析 |
Singular spectrum analysis of GPS monitoring data on specialty steel box girder bridge |
| |
| TANG Tongxu,YUE Dongjie.Singular spectrum analysis of GPS monitoring data on specialty steel box girder bridge[J].Engineering of Surveying and Mapping,2017,26(8). |
| |
| Authors: | TANG Tongxu YUE Dongjie |
| |
| Abstract: | Real-time accurate monitoring and analysis on deformation of large buildings for construction and operation are very important.Singular spectrum analysis (SSA) is a kind of statistical technique associated with the empirical orthogonal function.This paper adopts the method of singular spectrum analysis (SSA),combined with a method of power spectrum peak rate with the original sequence and RC1-2 reconstruction sequences of minimum mean square error to determine the optimal dimension M.The deformation trend and the oscillation cycle of cable tower are studied for specialty steel box girder bridge.Wavelet analysis technology can well describe the time sequence of the time-frequency distribution.But SSA reconstruction result is more smoothing than wavelet analysis,which can reflect the characteristics of time series better.North cable tower of the Sutong bridge monitoring sequence shows that N,E and U direction of north cable tower stay with obvious trends and significant changes in the cycle,and also contain more information noise. |
| |
| Keywords: | singular spectrum embedding dimensions deformation monitoring feature information wavelet analysis |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
|
