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薄壳结构的钢煤斗是火力发电厂的重要建筑物.受压状态下,薄壳结构的稳定性对壳体的初始几何缺陷是高度敏感的.因此,研究初始几何缺陷对钢煤斗稳定性的影响对于了解煤斗的实际受力状态有很大帮助.借助大型有限元软件建立了理想钢煤斗与考虑初始几何缺陷的钢煤斗两个模型,并分析与比较了这两个模型的强度、变形和稳定性.结果表明初始几何缺陷使钢煤斗的应力、变形均有所增大,屈曲临界荷载降低.钢煤斗设计中应充分考虑几何缺陷的影响,这对钢煤斗设计有一定指导意义.
The shell-structure steel coal hopper is an important building of thermal power plant.Under compressive conditions, the stability of shell structure is highly sensitive to the initial geometric imperfections of the shell.Therefore, the study of initial geometric defects on steel coal bucket stability The influence of sexuality is very helpful to understand the actual state of coal hopper.Based on the large finite element software, two models of ideal steel coal hopper and steel coal hopper considering initial geometric defects are established, and the two models are analyzed and compared The results show that the initial geometric defects make the stress and deformation of the steel coal hopper increase and the critical buckling load reduce.The design of the steel coal hopper should fully consider the influence of the geometric defects, Design has some guiding significance.