先进复合材料格栅加筋板的总体稳定性分析  

Global buckling load analysis of grid stiffened composite panels

作　　者：吴德财[1] 徐元铭[1] 万青[1] 

机构地区：[1]北京航空航天大学航空科学与工程学院,北京100083

出　　处：《复合材料学报》2007年第2期168-173,共6页Acta Materiae Compositae Sinica

基　　金：国家自然科学基金(10572012);航空科学基金(05B51043)

摘　　要：通过建立复合材料格栅结构单元的基本力学假设和分析模型,推导了一种新的等效刚度计算方法,用于分析复合材料格栅加筋板的总体稳定性。该方法充分考虑了筋条和面板的相互作用和中面偏移效应,并具有通用性。结合Rayleigh-Ritz能量近似法,推导出了求解加筋板总体屈曲载荷的通用特征方程;分析了多种算例,并与修正平铺法进行了比较,结果吻合得很好。Based on the proposed mechanical hypothesis and the analytical model of the grid stiffened composite panels, a new smeared stiffened theory was derived for analysing the global stability of grid-stiffened panels. The theory fully considered the effects of shell-stiffener interaction and influence of mid-plane shift. In this theory, the method is applicable for different types of grid stiffened elements. A general eigen function was deduced for computing global buckling load combined with a Rayleigh-Ritz method. The testing sample results were compared with those from the existing smeared stiffener theory, and they exhibited in good agreement. This proves the effectiveness of the proposed method.

关 键 词：复合材料格栅加筋结构 总体稳定性 平铺等效刚度法 

分 类 号：V214[航空宇航科学与技术—航空宇航推进理论与工程] V414