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CAPTURING LOCALIZATION OF LOCAL BUCKLING IN INTERACTIVE BUCKLING SCENARIOS

机译:交互式屈曲场景中局部屈曲的定位

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摘要

The interaction of local and overall buckling has been analyzed using novel finite elements in which local buckling deformation has been embedded. Amplitude modulation, a key feature of the interactive buckling has been incorporated in the element formulation. This work on interactive buckling of stiffened plates and shells has been extended in two important respects : (ⅰ) The inclusion of a key secondary local mode in cases where the cross-section has complete or approximate double symmetry, and (ⅱ) The introduction of a simple approach for capturing localization of the local mode. In order to model localization effectively, maximum possible freedom for the accentuation or alleviation of local buckling deformation in each of the member elements/plates is required. It is shown that this achieved easily by incorporating a single local buckling mode in the analysis, but selecting independent amplitude modulation functions for the elements.
机译:局部屈曲和整体屈曲的相互作用已使用新颖的有限元进行了分析,其中嵌入了局部屈曲变形。振幅调制(交互式屈曲的关键特征)已被并入元素公式中。加强板和壳体相互作用屈曲的这项工作在两个重要方面得到了扩展:(ⅰ)在横截面具有完全或近似双重对称的情况下,包括关键的次要局部模态,以及(ⅱ)引入一种捕获本地模式本地化的简单方法。为了有效地对局部进行建模,要求最大可能的自由度来强调或减轻每个构件/板中的局部屈曲变形。结果表明,通过在分析中合并单个局部屈曲模式,但为元素选择独立的幅度调制功能,可以轻松实现这一目标。

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