摘要
桥式起重机箱形梁是典型的薄壁结构,由于起重机受载情况及本身结构焊接缺陷等因素,在箱形梁上很容易出现疲劳裂纹。针对桥式起重机箱形梁疲劳裂纹现象,借助Ansys有限元软件,对箱形梁典型工况进行受载分析,判断出裂纹的位置及其产生原因;运用断裂力学和Ansys软件分析模拟出箱形梁疲劳裂纹的应力场、位移场以及应力场区域的大小,对起重机箱形梁进行疲劳裂纹扩展以及剩余寿命的预估都有意义。
The box girder of overhead travelling crane features typical thin-wall structure,in which fatigue crack can appear easily due to load situation and weld defects of the crane,etc.Considering such case,the Ansys finite element software is adopted for load analysis of typical working conditions of the box girder in order to figure out the position and causes of any crack,and the fracture mechanics and Ansys software are adopted for analysis and simulation of the stress field,displacement field of the fatigue crack in box girder,as well as the size of stress field,which is significant to estimate the fatigue crack expansion and remaining life of the crane box girder.
出处
《起重运输机械》
2012年第11期91-94,共4页
Hoisting and Conveying Machinery
