南京工业大学学报（自然科学版）2024，Vol.46Issue(4)：472-478,7.DOI:10.3969/j.issn.1671-7627.2024.04.012
基于金属磁记忆检测的正交异性钢桥面板疲劳应力检测
Fatigue stress detection of orthotropic steel bridge decks based on metal magnetic memory testing
摘要
Abstract
Steel box girders,as widely used in bridge construction,are prone to fatigue stress and cracks due to the high number of weld joints and the impact of wheel loads,which can lead to serious safety accidents.To address the problem of fatigue stress detection in orthotropic steel bridge decks,a method based on metal magnetic memory detection was proposed.Firstly,the time-domain,frequency-domain,and time-frequency-domain characteristics of the metal magnetic memory signal from the decks were extracted by establishing a metal magnetic memory testing system.Then,an extreme learning machine model for each signal feature and material's fatigue stress was established.Finally,material's fatigue stress was estimated using the model.The results showed that the system and the model were effective for fatigue stress detection in orthotropic steel bridge decks,with high estimation accuracy.The research results can be used as an important technical means for stress detection in orthotropic steel bridge decks.关键词
正交异性钢桥面板/金属磁记忆/疲劳应力/极限学习机/桥梁工程Key words
orthotropic steel bridge deck/metal magnetic memory/fatigue stress/extreme learning machine/bridge engineering分类
计算机与自动化引用本文复制引用
司海飞,史震,胡兴柳..基于金属磁记忆检测的正交异性钢桥面板疲劳应力检测[J].南京工业大学学报（自然科学版）,2024,46(4):472-478,7.基金项目
江苏省自然科学基金面上项目(BK20171114) （BK20171114）
教育部"春晖计划"合作科研项目(HZKY20220122) （HZKY20220122）
江苏省产学研合作项目(BY2020445) （BY2020445）
