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A layerwise/solid-element method for the composite stiffened laminated cylindrical shell structures

机译：复合加劲层合圆柱壳结构的分层/固元法

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摘要

For the composite stiffened laminated cylindrical shells, a layerwise/solid-element (LW/SE) method was established based the layerwise theory and the finite element method (FEM). In the present LW/SE method, the layerwise theory was used to model the behavior of the composite laminated cylindrical shells, and the eight-noded solid element is employed to discrete the stiffeners. And then, based on the governing equations of the shells and stiffeners, governing equation of the composite stiffened laminated cylindrical shells was assembled by using the compatibility conditions to ensure the compatibility of displacements at the interface between shells and stiffeners. To demonstrate the excellent predictive capability of this LW/SE method, several numerical examples were carried out to investigate the problem of static analysis and free vibration analysis for the composite stiffened laminated cylindrical shells. Good agreement had been achieved between the predictions and the results of finite element code MSC.Nastran. Furthermore, an analysis model for the composite shells structural systems reinforced by complex stiffeners, which is similar to the geometric form of the aircraft semi-monocoque fuselage structure, was developed based on the present coupling method. And the static response, natural frequencies and vibration modes were obtained.
机译：对于复合材料加筋的层合圆柱壳，基于层理论和有限元方法（FEM），建立了层/固元法（LW / SE）。在当前的LW / SE方法中，使用分层理论对复合材料叠层圆柱壳的性能进行建模，并使用八节点实体单元来离散加劲肋。然后，基于壳体和加劲肋的控制方程，利用相容性条件组装了复合加劲层合圆柱壳的控制方程，以确保壳体与加劲肋之间的界面处的位移具有相容性。为了证明这种LW / SE方法具有出色的预测能力，通过几个数值例子研究了复合材料加劲层合圆柱壳的静力分析和自由振动分析问题。有限元代码MSC.Nastran的预测与结果之间取得了很好的一致性。此外，基于目前的耦合方法，建立了一种复杂复合材料加强的复合材料壳体结构体系的分析模型，该模型与飞机半单身机身结构的几何形状相似。并获得了静态响应，固有频率和振动模式。

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