苏通大桥锚固区应力数据的分层去噪处理
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摘要
比较苏通大桥锚固区应力监测数据与气象资料后发现,气温对锚固区应力的影响显著.为了给锚固区传力机制分析提供准确的应力数据,结合同步气象观测资料,根据不同时段各噪声强度的差异,采用基于时段尺度的小波分层去噪方法逐级分离出气温对锚固区应力的不同影响.分析结果表明,该方法可基本消除气温对锚固区应力的影响,对类似索塔锚固区的高耸构筑物受力分析具有很好的工程应用效果.
Comparing the stress monitoring data of the anchorage zone for Sutong Bridge with the meteorological date,it is found that the stress in the anchorage zone is obviously influenced by temperature.In order to provide accurate and reliable stress data for the analysis of force transfer mechanics,according to the difference of noise intensity at different times and the synchronous meteorological data,the different influences of temperature on the stress in the anchorage zone were separated step by step using the method of wavelet layered de-noising based on the time scale.The results show that the method can eliminate the influence of temperature on the stress in the anchorage zone,and has a good application in the force analysis of topping structures in the cable-tower anchorage zone.
Comparing the stress monitoring data of the anchorage zone for Sutong Bridge with the meteorological date,it is found that the stress in the anchorage zone is obviously influenced by temperature.In order to provide accurate and reliable stress data for the analysis of force transfer mechanics,according to the difference of noise intensity at different times and the synchronous meteorological data,the different influences of temperature on the stress in the anchorage zone were separated step by step using the method of wavelet layered de-noising based on the time scale.The results show that the method can eliminate the influence of temperature on the stress in the anchorage zone,and has a good application in the force analysis of topping structures in the cable-tower anchorage zone.
引文
[1]冯凌云,苏庆田,吴冲.大跨度斜拉桥混凝土索塔钢锚箱的计算模型研究[J].现代交通技术,2005,2(4):26-29.(FENG Ling-yun,SU Qing-tian,WU Chong.Calculation method of concrete pylon with steel anchor box in long-span cable-stayed bridge[J].ModernTransportation Technology,2005,2(4):26-29.(in Chinese))
[2]夏平,覃琴.基于多尺度分析的数字通信系统消噪[J].广西师范大学学报:自然科学版,2005,23(1):13-16.(XIA Ping,TANQin.Noise-filtering of digital communications systems based on wavelet multi-resolution analysis[J].Journal of Guangxi NormalUniversity,2005,23(1):13-16.(in Chinese))
[3]CHEN Y.Multi-resolution analysis,its link to the discrete parameter wavelet transforms and its initialization[J].IEEE Trans SignalProcessing,1996,44(4):1001-1006.
[4]郭健,孙炳楠.基于小波变换的桥梁健康监测多尺度分析[J].浙江大学学报:工学版,2005,39(1):114-118.(GUO Jian,SUNBing-nan.Multi-scale analysis based on wavelet transform in bridge health monitoring[J].Journal of Zhejiang University:EngineeringScience,2005,39(1):114-118.(in Chinese))
[5]邬昱昆.苏通大桥超高索塔监测技术与数据处理研究[D].南京:河海大学,2007.
[6]MALLAT S G.A theory for multiresolution signal decomposition:the wavelet representation[J].IEEE Transactions on Pattern Analysis andMachine Intelligence,1989,11(7):674-693.
[7]DONOHO D L.De-noising by soft-thresholding[J].IEEE Transactions on Information Theory,1995,41(3):613-627.
[8]朱云芳,戴朝华,陈维荣.小波信号消噪及阈值函数的一种改进方法[J].中国测试技术,2006,32(4):28-30.(ZHU Yun-fang,DAI Chao-hua,CHEN Wei-rong.Wavelet denoising and a modified thresholding algorithm[J].China Measurement Technology,2006,32(4):28-30.(in Chinese))
[9]朱鲁,张振勇,陈香菱,等.小波阈值去噪方法在矿井电法数据处理中的应用[J].山东科技大学学报:自然科学版,2010,29(1):1-4.(ZHU Lu,ZHANG Zhen-yong,CHEN Xiang-ling,et al.Application of wavelet threshold noise-deadening method in mineelectrical data processing[J].Journal of Shandong University of Science and Technology:Natural Science,2010,29(1):1-4.(inChinese))
[10]刘文淑,林咸志,薛涛,等.基于小波变换的钢箱梁应力监测多尺度分析[J].河海大学学报:自然科学版,2010,38(4):407-410.(LIU Wen-shu,LIN Xian-zhi,XUE Tao,et al.Multi-scale analysis of stress monitoring of steel box girders based on wavelettransform[J].Journal of Hohai University:Natural Sciences:2010,38(4):407-410.(in Chinese))
[11]许昌,岳东杰.基于RTK-GPS技术的高索塔振动试验与分析[J].振东与冲击,2010,29(3):134-136.(XU Chang,YUE Dong-jie.Ambient vibration test of high pylon based on RTK-GPS technology[J].Journal of Vibration and Shock,2010,29(3):134-136.(inChinese))
[12]郑治真.小波变换及其MATLAB工具的应用[M].北京:地震出版社,2001:55-60.
[13]刘天佑,吴招才,詹应林,等.磁异常小波多尺度分解及危机矿山的深部找矿:以大冶铁矿为例[J].地球科学:中国地质大学学报,2007,32(1):135-140.(LIU Tian-you,WU Zhao-cai,ZHAN Ying-lin,et al.Wavelet multi-scale decomposition of magneticanomaly and its application in searching for deep-buried minerals in crisis mines:a case study from daye iron mines[J].Earth Science:Journal of China University of Geosciences,2007,32(1):135-140.(in Chinese))
[2]夏平,覃琴.基于多尺度分析的数字通信系统消噪[J].广西师范大学学报:自然科学版,2005,23(1):13-16.(XIA Ping,TANQin.Noise-filtering of digital communications systems based on wavelet multi-resolution analysis[J].Journal of Guangxi NormalUniversity,2005,23(1):13-16.(in Chinese))
[3]CHEN Y.Multi-resolution analysis,its link to the discrete parameter wavelet transforms and its initialization[J].IEEE Trans SignalProcessing,1996,44(4):1001-1006.
[4]郭健,孙炳楠.基于小波变换的桥梁健康监测多尺度分析[J].浙江大学学报:工学版,2005,39(1):114-118.(GUO Jian,SUNBing-nan.Multi-scale analysis based on wavelet transform in bridge health monitoring[J].Journal of Zhejiang University:EngineeringScience,2005,39(1):114-118.(in Chinese))
[5]邬昱昆.苏通大桥超高索塔监测技术与数据处理研究[D].南京:河海大学,2007.
[6]MALLAT S G.A theory for multiresolution signal decomposition:the wavelet representation[J].IEEE Transactions on Pattern Analysis andMachine Intelligence,1989,11(7):674-693.
[7]DONOHO D L.De-noising by soft-thresholding[J].IEEE Transactions on Information Theory,1995,41(3):613-627.
[8]朱云芳,戴朝华,陈维荣.小波信号消噪及阈值函数的一种改进方法[J].中国测试技术,2006,32(4):28-30.(ZHU Yun-fang,DAI Chao-hua,CHEN Wei-rong.Wavelet denoising and a modified thresholding algorithm[J].China Measurement Technology,2006,32(4):28-30.(in Chinese))
[9]朱鲁,张振勇,陈香菱,等.小波阈值去噪方法在矿井电法数据处理中的应用[J].山东科技大学学报:自然科学版,2010,29(1):1-4.(ZHU Lu,ZHANG Zhen-yong,CHEN Xiang-ling,et al.Application of wavelet threshold noise-deadening method in mineelectrical data processing[J].Journal of Shandong University of Science and Technology:Natural Science,2010,29(1):1-4.(inChinese))
[10]刘文淑,林咸志,薛涛,等.基于小波变换的钢箱梁应力监测多尺度分析[J].河海大学学报:自然科学版,2010,38(4):407-410.(LIU Wen-shu,LIN Xian-zhi,XUE Tao,et al.Multi-scale analysis of stress monitoring of steel box girders based on wavelettransform[J].Journal of Hohai University:Natural Sciences:2010,38(4):407-410.(in Chinese))
[11]许昌,岳东杰.基于RTK-GPS技术的高索塔振动试验与分析[J].振东与冲击,2010,29(3):134-136.(XU Chang,YUE Dong-jie.Ambient vibration test of high pylon based on RTK-GPS technology[J].Journal of Vibration and Shock,2010,29(3):134-136.(inChinese))
[12]郑治真.小波变换及其MATLAB工具的应用[M].北京:地震出版社,2001:55-60.
[13]刘天佑,吴招才,詹应林,等.磁异常小波多尺度分解及危机矿山的深部找矿:以大冶铁矿为例[J].地球科学:中国地质大学学报,2007,32(1):135-140.(LIU Tian-you,WU Zhao-cai,ZHAN Ying-lin,et al.Wavelet multi-scale decomposition of magneticanomaly and its application in searching for deep-buried minerals in crisis mines:a case study from daye iron mines[J].Earth Science:Journal of China University of Geosciences,2007,32(1):135-140.(in Chinese))
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