东南大学学报（英文版）2022，Vol.38Issue(2)：171-177,7.DOI:10.3969/j.issn.1003-7985.2022.02.009
基于小波变换的高速磁浮导轨模型更新方法
Updating method of a high-speed maglev guide way model based on wavelet transform
摘要
Abstract
The structure of a high-speed maglev guideway is taken as the research object.With the aim of identifying the inconsistency of modal parameters between the simulation model and the actual model,and based on the 600 km/h high-speed maglev vehicle and the high-speed maglev test line,the arrangement of sensors and the vibration acceleration data collection of the 12.384 m concrete guide way were conducted.The modal parameters were identified from the guide way response signal using wavelet transform,after which the wavelet ridge was extracted by using the maximum slope method.Next,the vibration modes and frequency parameters of the interaction vibration characteristics of the high-speed maglev guide way and 600 km/h maglev vehicle were analyzed.The updating objective function for the finite element model of the guideway was established,and the initial guideway finite element model was modified and updated by repeatedly iterating the parameters.In doing so,the model structure of the high-speed maglev guideway was obtained,which is consistent with the actual structure.The accuracy of the updated guideway model in the calculation of the dynamic response was verified by combining this with the vehicle-guideway coupling dynamic model of the high-speed maglev system with 18 degrees of freedom.The research results reveal that the model update method based on the wavelet transform and the maximum slope method has the characteristics of high accuracy and fast recognition speed.This can effectively obtain an accurate guideway model that ensures the correctness of the vehicle-guideway coupling dynamic analysis and calculation while meeting the parameters of the measured structure model.This method is also suitable for updating other structural models of high-speed maglev systems.关键词
磁浮列车/导轨结构/小波变换/最大坡度法Key words
maglev system/guideway/wavelet transform/maximum slope method分类
交通工程引用本文复制引用
王小农,黄靖宇..基于小波变换的高速磁浮导轨模型更新方法[J].东南大学学报（英文版）,2022,38(2):171-177,7.基金项目
The National 13th Five-Year Science and Technology Support Program of China(No.2016YFB1200602). （No.2016YFB1200602）
