摘要
采用ANSYS Workbench软件,对关节型五开道岔梁的3号段进行了静强度、模态及疲劳寿命分析。分析得到:道岔梁在静载荷作用下的等效应力最大值是52.44 MPa,小于材料的屈服强度极限;变形最大处在梁的中上部,约0.29 mm;存在明显的应力集中点,发生在焊接位置;1阶振型固有频率值约为51 Hz;道岔梁疲劳寿命仿真结果是49.6 a。研究表明:道岔梁在静载作用下的强度满足使用要求;模态分析中前3阶振型的变形位置与静强度分析显示的变形区域重合,该处需加强刚度;道岔梁疲劳寿命符合钢结构25 a的寿命设计要求。
The static,modal and fatigue life analysis of the third segment of joint five-switch beam has been studied by the ANSYS Workbench. The analysis displayed that the maximum equivalent stress under static loads is 52. 44 MPa,less than the yield limit strength of the material. Maximum deformation is about 0. 29 mm in the upper beam. There is obvious stress concentration point occurred in the welding position. Frequency of the first modal is about 51 Hz. The simulation result of switch beam＇s fatigue life is 49. 6 years. The results of analysis show that the static strength of the switch beam meets requirements. The deformation position of the first three modes in modal analysis coincides with the static strength deformation. The rigidity of this position needs to be strengthened. The fatigue life of switch beam satisfies the requirement of 25 years life of steel structure.
出处
《重庆交通大学学报（自然科学版）》
CAS
北大核心
2015年第1期1-5,11,共6页
Journal of Chongqing Jiaotong University(Natural Science)
关键词
桥梁工程
道岔梁
模态分析
强度
bridge engineering
switch beam
modal analysis
strength
