摘要
对11种构型的民用飞机机身加筋曲板的试验件建立了有限元模型,对其在轴压载荷下的后屈曲承载能力进行了非线性计算,得出壁板的破坏载荷与破坏模式,有限元计算结果与试验结果一致。在有限元模型验证的基础上,对该构型的壁板进行了试验设计,建立了二次响应面模型,并对壁板截面尺寸进行了敏感度计算。计算结果表明:在截面尺寸参数中,长桁的厚度为壁板破坏载荷值的主要影响因素,其敏感度指标为44.2%。最终给出的二次响应面模型多项式为设计提供了参考依据。
The nonlinear post--buckling loading process of 11 kinds of curved stiffened panels under axial compression loads was simulated by using the finite element （FE） method. The failure load and failure mode from FE results were obtained and agreed very well with the experimental results. Based on the FE results, the experimental design was applied for these panels and the dimensions sen- sitivity was computed by using the square response surface model. It is found that the thickness of the stringers has a larger effect, about 44.2 % in total, on the critical damage load. Finally, response surface polynomial of the panel is given out to provide the basis for better design.
出处
《中国机械工程》
EI
CAS
CSCD
北大核心
2009年第7期812-816,共5页
China Mechanical Engineering
关键词
加筋曲板
后屈曲
轴压
试验设计
二次响应面
stiffened panel
post-- buckling
axial compression load
experimental design
square response surface
