【作者】 张跃； 戴振羽； 段凯元；

【Author】 ZHANG Yue,DAI Zhen-yu,DUAN Kai-yuan (Southwest Jiaotong Univ.Applied Mech.and Eng.,Chengdu 610031,China)

【机构】 西南交通大学应用力学与工程系；

【摘要】 采用三维热弹塑性有限元理论,并考虑了金属相变原理对焊接过程的影响,以大型通用有限元软件Ansys作为计算工具,研究转轮叶片与上冠和下环焊缝处的残余应力及其分布规律。在得到计算结果后将其与没有考虑相变过程的结果进行比较,分析出相变对焊接过程的影响。更多还原

【Abstract】 Using three-dimensional thermal elastic-plastic finite element theory and the principle of metal phase change,the welding residual stress and its distributing rule in the welding lines between the blades and the crowns or bands of large turbine runner is studied.The results are compared to the results which are not considered phase change and the effect of the phase change in the welding process is analyzed.更多还原