| GPS桥梁形变监测的半日波信号分析 |
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| 引用本文： | 袁振超,黄川,李博峰,沈云中. GPS桥梁形变监测的半日波信号分析[J]. 工程勘察, 2009, 0(7): 45-47 |
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| 作者姓名： | 袁振超 黄川 李博峰 沈云中 |
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| 作者单位： | 同济大学测量与国土信息工程系;国家测绘局现代工程测量重点实验室; |
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| 基金项目： | 自然科学基金资助项目(40674003) |
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| 摘 要： | 本文根据东海大桥从2006年9月19日至11月15日的GPS监测数据，通过傅立叶变换发现明显的半日波信息，用最小二乘谐估计分析了半日波的成因主要是多路径效应，其数值约为1．5cm；只有在大潮前后，潮汐对桥面竖向位移也有较为明显的半日波信号，此时为两种因素引起的半日波信号的叠加。
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| 关 键 词： | 时间序列 频谱分析 最小二乘谐估计 半日波 |
Analysis of semi-diurnal wave signal for GPS bridge deformation monitoring |
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| Yuan Zhenchao,Huang Chuan,Li Bofeng,Shen Yunzhong. Analysis of semi-diurnal wave signal for GPS bridge deformation monitoring[J]. Geotechnical Investigation & Surveying, 2009, 0(7): 45-47 |
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| Authors: | Yuan Zhenchao Huang Chuan Li Bofeng Shen Yunzhong |
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| Affiliation: | Yuan Zhenchao~1,Huang Chuan~1,Li Bofeng~1,Shen Yunzhong~(1,2)(1.Dept.of Surveying and Geo-informatics,Tongji University 200092,Shanghai,China,2.Key Lab of Advanced Surveying Engineering of State Bureau of Surveying and Mapping,Shanghai 200092,China) |
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| Abstract: | According to the GPS measurement of Donghai-Bridge from Sept.19-Nov.15,2006,the semi-diurnal wave signal was obviously found by flourier transform method and its cause analyzed by the least-square harmonic estimation.The main factor of this semi-diurnal signal was multi-path effect and its value about 1.5cm.But,only in the high tide time,the effect of the tide on vertical displacement of bridge deck could also cause the semi-diurnal wave signal which was triggered by multi-path effect at the same time. |
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| Keywords: | time series spectrum analysis least-square harmonic estimation semi-diurnal |
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