熊春宝 ,陈 雯 ,王 猛 ,熊爱成 ,韩 龙 ,于丽娜
AuthorsHTML:熊春宝 ¹ ，陈 雯 ¹ ，王 猛 ¹ ，熊爱成 ² ，韩 龙 ¹ ，于丽娜 ¹
AuthorsListE:Xiong Chunbao,Chen Wen,Wang Meng,Xiong Aicheng,Han Long,Yu Lina
AuthorsHTMLE:Xiong Chunbao¹，Chen Wen¹，Wang Meng¹，Xiong Aicheng²，Han Long¹，Yu Lina¹
Unit:1. 天津大学建筑工程学院，天津 300350；
2. 天津市陆海测绘有限公司，天津 300304

Unit_EngLish:1. School of Civil Engineering，Tianjin University，Tianjin 300350，China；
2. Tianjin Surveying and Hydrography Co.，Ltd.，Tianjin 300304，China

Abstract_Chinese:采取 RTK-GNSS 技术对海上石油平台桩腿结构进行水平位移监测以分析其振动特征．针对复杂环境下多路 径效应对 RTK-GNSS 监测结果的影响，利用草地和水域两种场地环境进行多路径效应测试试验．经分析，水域环境 中多路径误差更大，而对于极为复杂的海上环境更需要对监测数据滤波降噪以削弱多路径误差．因此，提出了基于 自相关函数和相关系数的集合经验模态分解(EEMD)-切比雪夫滤波对埕岛油田一平台桩腿结构的 RTK-GNSS 监测 数据进行处理．结果表明：①RTK-GNSS 技术能够用于海上环境中的平台桩腿动态位移监测；②自相关函数与相关 系数相联合可以实现本征模态函数的有效选取和信号重构；③降噪前后信号的相关性均高于 0.85，证明所提滤波方 法既能保留有效信息成分又能削弱多路径误差；④经降噪后，可更清晰地看出桩腿结构的实时水平位移信息及运动 轨迹，为海上结构监测提供了更优的途径．
Abstract_English:RTK-GNSS technology was adopted to monitor the horizontal displacement of the offshore oil platform pile leg structure to analyze its vibration characteristics. Aiming at the impact of multipath effects on the RTK-GNSS monitoring results in complex environments，a multipath effect test experiment was conducted using two field environments of grassland and water. Analysis results revealed a greater multipath error in the water environment. However，it was necessary to filter and reduce noise on the monitoring data for extremely complex marine environments to eliminate multipath errors. Therefore，the ensemble empirical mode decomposition(EEMD)-Chebyshev filter based on autocorrelation function and correlation coefficient was proposed to process the RTK-GNSS deformation monitoring data of the pile leg structure of Chengdao oilfield. Results showed that：①RTK-GNSS technology can be used on the sea dynamic deformation monitoring of platform legs in the environment；②the combined autocorrelation function and correlation coefficient can achieve an effective selection and signal reconstruction of intrinsic modal functions；③the correlation of signals before and after noise reduction was higher than 0.85，which proved that the proposed filtering method can retain effective information components and suppress multipath errors；and④after noise reduction，real-time horizontal displacement information and movement trajectory of the pile leg structure was evident，providing a better way for the deformation monitoring of offshore structures.
Keyword_Chinese:RTK-GNSS；多路径效应；海上平台；桩腿结构；振动位移；滤波降噪
Keywords_English:RTK-GNSS；multipath effect；offshore platform；leg structure；vibration displacement；filtering noise reduction

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