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轴向挤压和不同量级的侧向压力作用下,运用非线性有限元法对高强铝合金加劲板进行后屈曲性能分析,并对研究结果进行了总结。分析中考虑了材料和几何非线性,几个关键的变量包括:板厚度;边界条件;加劲肋的几何特性,包括其几何缺陷;焊接中产生的热效应区域宽度和残余应力。对这些变量对此类加劲板后屈曲性能和极限强度的影响进行了详细的研究。
Axial compression and lateral pressure of different magnitudes, the non-linear finite element method is used to analyze the post-buckling performance of high-strength aluminum alloy stiffened plates, and the research results are summarized. The material and geometrical nonlinearities are taken into account in the analysis. Several key variables include: plate thickness; boundary conditions; geometric properties of the stiffeners, including their geometric imperfections; and the width of thermal effects and residual stresses in the weld. The effects of these variables on the post-buckling performance and the ultimate strength of such stiffened plates were studied in detail.