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《Chinese Journal of Geophysics》 2013-01
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An auto-cross PSD method to remove background vibration from observational records of traffic environment vibration

ZHENG Xin 1,2,3,TAO Xia-Xin2,3,WANG Fu-Tong3,4,XIE Heng-Yan1 1 Department of Engineering,Heilongjiang Bayi Agricultural University,Daqing Heilongjiang 163319,China 2 School of Civil Engineering,Harbin Institute of Technology,Harbin 150090,China 3 Institute of Engineering Mechanics,China Earthquake Administration,Harbin 150080,China 4 School of Civil Engineering and Architecture,Heilongjiang University,Harbin 150001,China  
Removing background vibration from the observational records of traffic environment vibration is an important step in increasing the signal to noise ratio and demonstrating the characteristics of traffic environment vibration.In this work,the shortcomings of existing methods to resolve this task are analyzed.Then,an idea of removing the background vibration from the auto-cross spectrum was put forward,in which the cross-relativity between the background vibration and the observed vibration is considered.The calculation formula is derived and the reliability of this method is demonstrated through an example.The results show that using the auto-cross spectrum method,the background vibration in observation data can be removed more effectively,and the power spectrum,time history,vibration level and weighted level of the traffic environment vibration that are close to the real ones are obtained.In the low-frequency band dominated by background vibration,the method presented in this paper is superior to the other current methods in accuracy.
【Fund】: 国家自然科学基金重点项目(50538030);; 黑龙江省教育厅科学技术研究面上项目“轨道交通引起的季冻区冬夏两季饱和土场地环境振动衰减关系研究”资助
【CateGory Index】: TB533.2
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