箱形梁主腹板在复合边界条件下的稳定

Stabilization of main web of crane box girder under combined boundary condition.

本文采用Ritz——有限条法计算了受轮压作用的起重机箱形梁主腹板在复合边界条件下的屈曲。为适应多种复合边界条件的变化,使计算程序具有通用性,板的位移函数采用正交多项式及三角函数近似。本方法与有限元法及有限条法相比,可使计算工作量显著减少。

This paper presents calculation of wheel loaded main web of crane box girder on buckling under combined boundry condition through the use of Ritz-finite stripe method. In order to meet various combination of boundary condition to make the program more common, the displacement function is approximately presented in orthogonal polynomials and trigonometric function. Compared with finite element method and finite stripe method, the given method cuts remarkably the amount of calculation work.