大型反应器加劲薄钢板结构屈曲性能

Buckling behavior of thin steel sheets with ribbed stiffeners in a selective catalytic reactor

通过有限元方法分析了大型反应器钢结构体系的受力与变形的薄弱位置,并对反应器中大量使用的加劲薄钢板的屈曲性能进行了研究.在此基础上,实验分析了加劲板的稳定性.结果表明:矩形薄钢板开孔周围加加劲肋时,加劲肋对板起到嵌固作用;对于此反应器整体结构来说,薄板选择L形加劲肋最优;对于带有加劲肋的薄板,边界约束条件越强,临界屈曲荷载越大,板越不易发生屈曲.实验和数值结果有较好的一致性.

The finite element method was used to analyze weak positions of load and deformation in the steel structure system of a large-scale selective catalytic reactor and study the buckling behavior of thin steel sheets with ribbed stiffeners. Based on these simula- tions, the stability of the sheets was discussed by experiment. The results indicate that the sheets are strengthened when rectangular holes are attached to ribbed stiffeners, which should choose L-ribbed stiffeners for the whole structure. The stronger the boundary con- straint condition of thin steel sheets with ribbed stiffeners is, the bigger the critical buckling loading is, and the more difficult to buckle the sheets are. The experimental data are in better agreement with the simulation results.