单轴力多约束条件下复合材料单向加筋壁板结构效率分析方法

通过建立复合材料单向加筋壁板单元的基本力学假设和计算分析模型,提出了一种多约束条件下进行快速结构效率分析的方法,并利用该方法对典型的复合材料单向加筋壁板进行了结构效率分析和优化,得到了其结构效率随各设计参数的变化趋势和相对最优结构参数。本文方法综合考虑筋条总体稳定性、局部稳定性、结构静强度约束及其之间相互影响,并在基本假设的基础上将复合材料结构离散变量转化为独立的连续设计变量,使得结构力学性能分析和优化分析大为简化,对本文方法所得结果与试验及有限元分析所得结果做了比较,吻合得较好。研究结果为复合材料单向加筋壁板的设计提供了直接参考,具有较好的实际工程应用和参考价值。 

A method for structure efficiency analysis of unidirectional stiffener composite panels in single-axial compression under multi-constraint case

Based on the proposed basic mechanical hypothesis and calculation analytical model of unidirectional stiffener composite panel unit, a method was developed for analyzing structure efficiency quickly under the multi-constraint case. Analysis and optimization of structure efficiency for typical unidirectional stiffener composite panel was done using present method. And the structure efficiency variation trend which changes with the design parameters was obtained as well as the relatively optimum structure parameters. Present method synthetically accounts for the global stability of stiffener, local stability, static strength constrains of structure and interaction of them. Upon the basic hypothesis, the discrete variables of composite structure change to independent continuous design variables, thus it can observably simplify the analysis of structure mechanical properties and optimization. Results from the test and finite element analysis were compared with those from the present method, and they exhibit in good agreements. The research results can directly provide reference for the design of the unidirectional stiffener composite panels. And the method has good practical engineering application and reference value.