中国铁道科学2018，Vol.39Issue(3)：24-30,7.DOI:10.3969/j.issn.1001-4632.2018.03.04
基于小波能量熵的铁路简支钢桁梁桥损伤预警方法
Damage Alarming Method for Railway Simply-Supported Steel Truss Girder Bridge Based on Wavelet Energy Entropy
摘要
Abstract
A railway simply-supported steel truss girder bridge was taken as the research object and the train loads were simplified as moving load series.The discrete wavelet transform was conducted for structural responses under moving loads and the wavelet energy for each layer was calculated.By using the sensitivity of wavelet energy entropy to signal mutation,a damage alarming method for bridges based on wavelet energy entropy was proposed.Various types of damage alarming conditions of a through steel truss girder bridge were analyzed by the proposed method to study the influence laws of damage degrees,damage locations and the arrangement locations of measurement points on damage alarming effects.Results show that the proposed method can accurately predict the damage occurrence time of steel truss girder bridge with different locations and degrees.It has strong robustness and can perfectly solve the boundary effect problem.A positive correlation is found between the damage alarming effect and damage degree.The damage alarming effect is more obvious when the distance between the measurement point and damage position is closer.关键词
铁路简支钢桁梁桥/小波能量熵/移动荷载列/信号突变/损伤预警/离散小波变换Key words
Railway simply-supported steel truss girder bridge/Wavelet energy entropy/Moving load series/Signal mutation/Damage alarming/Discrete wavelet transform分类
交通工程引用本文复制引用
战家旺,闫宇智,张飞,姚京川..基于小波能量熵的铁路简支钢桁梁桥损伤预警方法[J].中国铁道科学,2018,39(3):24-30,7.基金项目
国家自然科学基金资助项目(51678032) （51678032）
中国铁路总公司科技研究开发计划项目(2017G002-B) （2017G002-B）
