薄壁型方管立柱局部稳定性分析

Local Stability Analysis of Thin-walled Square Column

根据薄板小挠度屈曲理论,研究薄壁型方管立柱的局部稳定性问题。分别对薄壁型方管立柱的翼缘和腹板进行了受力分析,结合翼缘和腹板的位移函数得到薄壁型方管立柱屈曲的边界条件,由此推导出薄壁型方管立柱屈曲临界载荷的理论解,并给出了公式运用的具体算例。对算例利用ANSYS有限元分析方法进行相同工况的模拟分析,两者结果一致。

Based on the theory of buckling of thin plate,this paper researches on the local stability of the column,analyzes the flange and the web of the thin-walled pipe,obtains the boundary conditions of buckling of thin-walled square pipe column by using the displacement function of the flange and web,thus deducing the theoretical solution of column buckling critital load and gives an example. The ANSYS finite element method is used to validate the example that both the all the same.