摘要
通过对模拟的起重机焊接箱形梁残余应力分布的测试和分析,提出了三个横断面(大隔板断面,无隔板断面、小隔板断面)的最大残余应力区位于腰缝及其背面的盖板上,上盖板和腹板的大隔板处有较大的横向拉应力,小隔板下方的腹板处出现较大的双向压应力区。根据残余应力测试的结果,对起重机主梁的下挠变形进行了分析。
The distribution of residual stress of a simulating welded box type girder of a crane is tested and analysed. As a result, it is shown that the maximum residual stresses of three cross sections (cross section with full depth stiffener, cross section without stiffener, cross section with partial depth stiffener) are located at waist welding seam and lower cover plate, that there is a great traverse tensile stress at the upper cover plate and the web near the full depth stiffener, and there appears a great two-way pressure stress area at the web below the partial depth stiffener. Analysis of deflection of main girder of crane is made according to the result of residual stress test.
出处
《起重运输机械》
1992年第5期24-27,共4页
Hoisting and Conveying Machinery
