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提出了一个用于复合材料叠合梁结构分析的有限元模型,梁结构具有几何非线性性能,包括扭转翘曲变形。采用一个考虑了改进拉格朗日法和广义位移控制法的公式对结构的变形进行计算。采用二次等参有限单元对梁横截面进行离散化,以确定梁的弯扭特性。利用两结点的Hermitean三维有限梁元对结构进行离散化,其中每结点具有7个自由度。运用数个实例,分析了层的取向对结构性能的影响。
A finite element model was proposed for structural analysis of composite laminated beams. The beam structure has geometric nonlinear properties, including torsional warpage. Structural deformation is calculated using a formula that takes into account the improved Lagrangian and generalized displacement control methods. The second isoparametric finite element is used to discretize the beam cross section to determine the bending and torsional characteristics of the beam. The structure is discretized using a two-node Hermitean finite element beam with seven degrees of freedom per node. Using several examples, the influence of layer orientation on the structure performance is analyzed.