ANSYS高速列车转向架振动时效工艺过程的有限元仿真
关键词 残余应力 振动时效 转向架 有限元法
毕业设计说明书（论文）外文摘要
Title Finite Element Simulation of the Vibratory Stress Relief Process on High-speed Train Bogie
Abstract
The welding of the high strength steel on High-speed train bogie induce the high residual stress in the structure . This residual stress ,if not eliminate ,will cause cracking in the bogie . The purpose of this paper is to study the feasibility of the elimination or homogenization of the welding residual stress by vibratory stress relief (VSR) method instead of the traditional method. The finite analyze element model bogie is created by Ansys software. The natural frequencies and mode shapes of each order of the structure are gained by modal analysis .Through the harmonic response analysis ,the dynamic stress of the key points under the different exciting location, loading quantity , loading frequence ,constrain condition are obtained ,these results can provide the theoretical support for the effective elimination of the residual stress at the specified position . The welding sample was analyzed by the experiment VSR .The blind hole were used to measure the size of the residual stress before and after the vibration treatment . The final experiment showed VSR can reduce or eliminate the welding residual stress of workpiece ,the validity of the technique for bogie eliminate welding residual stresses provide a reference value.
Keywords Bogie VSR residual stress finite element method
目 次
1 绪论 1
1.1 残余应力的研究概况 1
1.2 振动时效的发展状况 1
1.2.1 振动时效的国内研究现状 1
1.2.2 振动时效的国外研究现状 2
1.3 转向架的焊接残余应力研究状况 3
1.4 本论文的主要研究内容 3
2 振动时效机理研究 5
2.1 振动时效的原理 5
2.2 振动时效的工艺 5
2.3 振动时效的效果评判 7
2.4 本章小结 7
3 某转向架的动态特性有限元分析 8
3.1有限元建模 8
3.2 模态分析 8
3.3 谐响应分析 10
3.4 本章小结 25
4 振动时效的实验研究 27
4.1 实验设施的组成 27
4.2 实验测量过程 30
4.2.1 测量残余应力的盲孔法 30
下一篇：火炮关键部件的动载荷识别