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本文基于截面变形的平面假设和截面参数的逆线性假设,导出了计算梁腹钣剪切变形的小锥度变截面四节点梁元的刚度矩阵。从而,对多梁多肋的翼型,可把平盒式结构的三角形元素作蒙皮和梁元素为内部构件的这种理想化模型推广到斜盒式结构,使得这种结构理想化模型能方便地用于飞机结构分析。论证计算表明效果是良好的。
In this paper, based on the assumption of the plane deformation of the section and the inverse linear assumption of the section parameters, the stiffness matrix of the four-node beam element with small taper variable cross-section for calculating the shear deformation of the beam web is derived. Thus, for the multi-beam multi-rib airfoil, the ideal element of the triangular element of the flat box structure for skin and beam elements as internal components is extended to the oblique box structure, making the ideal model of this structure able to Easy to use for aircraft structural analysis. Demonstration calculations show that the effect is good.