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从分别列出加筋板面板以及加强筋的运动方程出发,分析了爆炸载荷作用下双向加筋固支方板的大挠度塑性动力响应。分析表明:取决于加强筋的相对刚度以及爆炸载荷峰值的大小,加筋板的运动将呈现3种不同的模式。该文限于讨论加筋板的总体变形模式,具体讨论了十字加筋以及双十字加筋固支方板在忽略弯矩影响下的薄膜解法。理论结果与已有的试验结果在多数情况下符合良好,表明该文提出的简化理论分析方法能对爆炸载荷下双向加筋方板的永久变形做出较为合理的预报。
Based on the equations of motion of stiffened panels and stiffeners respectively, the large-deflection plastic dynamic response of stiffened plates subjected to explosive load is analyzed. The analysis shows that, depending on the relative stiffness of the stiffener and the peak value of the explosion load, the stiffened plate will exhibit three different modes of motion. This article is limited to the discussion of the overall deformation mode of stiffened panels. The thin film solution of cross-stiffened and double-stiffened stiffened panels under the influence of bending moments is discussed in detail. The theoretical results are in good agreement with the existing experimental results in most cases, indicating that the simplified theoretical analysis method proposed in this paper can make a more reasonable prediction of the permanent deformation of biaxial stiffened square plates under blast loading.