Study on the Finite Element Modeling for Post-buckling Analysis of the Stiffened Structure
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摘要: 预估加筋结构的承载能力对飞机设计极为重要，对整体加筋结构和铆接加筋结构分别拟定一系列不同的有限元模型化方法，考虑材料和几何非线性进行后屈曲分析。对比试验数据和分析结果可知，选取合适的离散化方法可以准确预估这两种结构形式的破坏载荷。对含有整体加筋板和铆钉连接的机翼盒段进行后屈曲分析验证，有限元预估值与试验数据吻合很好。Abstract: To predict the load-carrying capacity is crucial in the aircraft design procedure, various methods of modeling in the post-buckling analysis are respectively investigated on the integral stiffened structures and riveted stiffened structures. Comparing the analytic with experimental data, we indicatec suitable discreting method could exactly predict the failure load for two kinds of the stiffened structural shape. Correlation between finite element (FE) predictions and the test data is very good for analyzing & validating the wing box including integral stiffened panels and rivet connectors.
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Key words:
- carrying capacity /
- modeling /
- post-buckling /
- rivets /
- stiffened structure
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