中国铁道科学2018，Vol.39Issue(1)：82-87,6.DOI:10.3969/j.issn.1001-4632.2018.01.11
高速动车组角焊缝应力集中的识别方法
Identification Method for Stress Concentration on Fillet Weld of High-Speed EMU
摘要
Abstract
Since the stress concentration on the fillet weld of the welded frame for high-speed EMU cannot be identified by nominal stress method,based on structural stress method,the nonlinear stress at weld toe is first decomposed into two parts,including structural stress in external load equilibrium and notch stress in self-equilibrating.Then,according to the equilibrium equation of the force,the corresponding relationships between nodal forces and moments,and line forces and moments are calculated.The calculation formula of structural stress is further derived and the identification process of stress concentration on fillet weld is given.On the basis of the proposed formula and identification process,a special software WSS for stress identification in welded structure is developed with APDL language provided by C/C + + and ANSYS software.The stress concentration on the fillet weld of the welded frame for a high speed EMU is identified.It is verified that the identification method based on structural stress not only can identify the specific position of stress concentration,but also can calculate the specific stress peak and corresponding fatigue life.It can be used to optimize the anti-fatigue design of the welded frame for high speed EMU.关键词
高速动车组/焊接结构/角焊缝/应力集中/结构应力/主S—N曲线/疲劳损伤Key words
High-speed EMU/Welded structure/Fillet weld/Stress concentration/Structural stress/Master S-N curve/Fatigue damage分类
交通工程引用本文复制引用
兆文忠,李季涛,李晓峰,李向伟,董平沙..高速动车组角焊缝应力集中的识别方法[J].中国铁道科学,2018,39(1):82-87,6.基金项目
国家自然科学基金资助项目(11272070) （11272070）
中国铁路总公司科技研究开发计划项目(2015J007-H) （2015J007-H）
西南交通大学牵引动力国家重点实验室项目(TPL1605) （TPL1605）
