基于小波变换的钢箱梁应力监测多尺度分析  

Multi-scale analysis of stress monitoring of steel box girders based on wavelet transform

作　　者：刘文淑[1] 林咸志 薛涛[3] 陈志坚[3] 陈青[3] 

机构地区：[1]南京大学地球科学系,江苏南京210093 [2]浙江华光潭水力发电公司,浙江临安311322 [3]河海大学地球科学与工程学院,江苏南京210098

出　　处：《河海大学学报（自然科学版）》2010年第4期407-410,共4页Journal of Hohai University(Natural Sciences)

基　　金：国家“十一五”科技支撑计划(2006BAG04B05);国家重点基础研究发展计划(973计划)(2002CB412707)

摘　　要：为了分析不同频率噪声对钢箱梁应力的影响,首先结合同期气象资料建立实测数据与主要影响因素之间的相关关系;其次,采用小波多尺度分析方法对实时测量数据进行分解和重构,并依次剔除噪声引起的结构响应.研究结果表明,采用小波多尺度分析方法处理后的数据更能精确地反映钢箱梁真实的应力响应.In order to analyze the influences of noise with different frequencies on the stress of steel box girders,first of all,the correlation between the measured data and the main factors was established combining with the contemporaneous meteorological data; then,the real-time measurement data were decomposed and reconstructed by using the wavelet multi-scale analysis; finally,the structural response caused by the noise was eliminated in turn. The results show that the processed data by using the wavelet multi-scale analysis can reflect the true stress response of steel box girders more accurately.

关 键 词：钢箱梁 应力监测 小波变换 多尺度分析 苏通大桥 

分 类 号：U448[建筑科学—桥梁与隧道工程]