考虑不确定性的复合材料加筋壁板后屈曲分析模型验证方法  

Validation method for post-buckling analysis model of stiffened composite panels considering uncertainties

作　　者：王彬文[1] 艾森[1] 张国凡[1] 聂小华[1] 吴存利[1] WANG Binwen;AI Sen;ZHANG Guofan;NIE Xiaohua;WU Cunli(Aircraft Strength Research Institute of China,Xi'an 710065,China)

机构地区：[1]中国飞机强度研究所,西安710065

出　　处：《航空学报》2020年第8期274-281,共8页Acta Aeronautica et Astronautica Sinica

基　　金：工信部民机科研项目(MJ-2015-F-027)。

摘　　要：复合材料加筋壁板在结构轻量化设计中,由于材料组分、几何尺寸具有不确定性,导致了壁板结构在服役条件下承载特性的不确定性。针对上述问题,提出了一种考虑参数不确定性的复合材料加筋壁板后屈曲模型验证方法。首先基于正交试验设计方法进行了不确定性参数的显著性分析,然后采用Kriging模型构建了能够表征后屈曲特性的代理模型,利用蒙特卡洛随机模拟获得加筋壁板后屈曲载荷概率分布,最后通过壁板结构在典型承载条件下的力学实验数据验证了分析模型的准确性。该分析方法对于壁板件在实际工程中的应用具有一定指导意义。In the lightweight structural design of stiffened composite panels,uncertainties in the geometric and material parameters lead to the uncertainty of ultimate load carrying capacity.Therefore,it is necessary to consider these uncertainties in model validation.A method to validate the post-buckling finite element model of stiffened composite panels considering the uncertain factors is proposed.Based on the orthogonal experimental design,the significance analysis of the uncertainty parameters was first carried out to obtain significance parameters,followed by the acquisition of a surrogate model by the Kriging model to represent the post-buckling characteristics.The probability distribution of the post-buckling loads for the stiffened composite panel was achieved by Monte Carlo simulations,and the accuracy of the post-buckling model verified by experimental data.This validation approach can be applied to similar engineering cases.

关 键 词：复合材料 加筋壁板 后屈曲 不确定性 模型验证 

分 类 号：V258.3[一般工业技术—材料科学与工程]