华东交通大学学报2025，Vol.42Issue(5)：13-20,8.
基于半解析谱元法的钢轨导波频散特性分析
Analysis on Guided Wave Dispersion Characteristics of Rail Through Semi-Analytical Spectral Element Methods
摘要
Abstract
This study analyses the dispersion characteristics of guided waves in rails.The semi-analytical spec-tral element method is proposed,and the finite element model of guided wave propagation in rails is established.Firstly,the spectral element method was used to improve the traditional semi-analytical finite element method,and the characteristic equation of waveguide structure was obtained.Secondly,based on the characteristic equa-tion,the dispersion curves of an aluminum plate were calculated,and the dispersion characteristics of guided waves were analyzed.By comparing with the analytical solution of the aluminum plate,the accuracy of semi-an-alytical spectral element method was verified.Subsequently,the guided wave simulation model of the rail was es-tablished,and the dispersion characteristics of the guided wave in the rail were investigated.Finally,guided wave experiment for the CHN60 rail was carried out by RITEC RAM-5000 SNAP nonlinear high-energy ultra-sonic wave experiment system.The experimental results show that the group velocity obtained by the proposed method is highly consistent with the group velocity measured by experiment,and the relative error is only 0.99%.Hence,the semi-analytical spectral element method has high accuracy and feasibility in the analysis of guided wave dispersion characteristics of the rails,which provides a theoretical basis for guided wave damage de-tection in rails.关键词
超声导波/频散特性/谱元法/钢轨Key words
ultrasonic guided wave/frequency dispersion characteristics/spectral element method/rail分类
交通运输引用本文复制引用
罗伟兵,陈华鹏,李浩华,康晨曦,张国印,周杭..基于半解析谱元法的钢轨导波频散特性分析[J].华东交通大学学报,2025,42(5):13-20,8.基金项目
国家自然科学基金项目(51978263) （51978263）
国家重点研发计划项目(2021YFE0105600) （2021YFE0105600）
江西省科技合作专项重点项目(20212BDH80022) （20212BDH80022）
江西省重点研发计划"揭榜挂帅"项目(20223BBH80002) （20223BBH80002）
