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分别运用特征值法和弧长法开展T字型加筋壁板稳定性及其影响因素分析。分析表明:特征值法和弧长法所得结果相近,弧长法分析结果较为安全,特征值法可作为观察模型屈曲位置及模态图的分析方法。加筋壁板屈曲载荷随筋条间距的变化呈抛物线状,较平均的筋条布置有利于加筋壁板的整体稳定性。加筋壁板屈曲载荷随凸缘宽度的变化呈抛物线状,保持筋条横截面面积不变,筋条凸缘宽为60mm时屈曲载荷达到最大值。较小的凸缘宽度会导致筋条屈曲的发生,应在实际设计中予以避免。
The eigenvalue method and arc length method are respectively used to analyze the stability of T-shaped stiffened siding and its influencing factors. The analysis shows that the results obtained by the eigenvalue method and the arc-length method are similar, and the results obtained by the arc-length method are safer. The eigenvalue method can be used as the analysis method for observing the buckling position and the mode diagram of the model. The buckling load of the stiffened panel is parabolic with the variation of the spacing of the stiffeners. The more uniform arrangement of the stiffeners is beneficial to the overall stability of the stiffened panel. The buckling load of the stiffened panel is parabolic with the variation of the width of the flange, keeping the cross-sectional area of the stiffener constant, and the buckling load reaches the maximum when the width of the rib is 60mm. Smaller flange width will lead to the occurrence of tendon buckling should be avoided in the actual design.