基于不确定性的复合材料加筋壁板模型评估与修正  

Finite element model evaluation and updating for stiffened composite panel based on the uncertainties

作　　者：艾森[1] 张国凡[1] 王立凯[1] 吴存利[1] Ai Sen;Zhang Guofan;Wang Likai;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十室,西安

出　　处：《飞行器强度研究》2022年第1期25-32,共8页Aircraft Strength Research

摘　　要：针对复合材料加筋壁板的模型修正问题,在不确定性体系下.建立一套适用于计算屈曲特性的有限元模型评估与修正方法。首先.在确定性体系下构建用于复合材料加筋壁板屈曲特性计算的有限元模型.并利用正交试验设计筛选对屈曲特性具有显著影响的不确定性参数;然后利用中心组合试验设计和二阶响应面方程构建代理模型;最后,采用粒子群优化算法获得待修正参数的选优结果。该结果表明:模型预测结果与试验结果的累积分布函数和概率密度函数均趋于一致.证明建立的复合材料加筋壁板不确定性模型评估和修正方法的有效性。In view of the problem of model updating for the stiffened composite panel,a set of finite element model evaluation and updating methods suitable for calculating buckling characteristics was established under the uncertainty system.Firstly,a finite element model for the buckling characteristics was constructed under a deterministic system,and the orthogonal experimental design was used to screen the uncertain parameters that had a significant effect on the buckling characteristics;then,the surrogate model was constructed by using the central composite design and second-order response surface e-quation;finally,the particle swarm optimization algorithm was used to obtain the optimal results of the parameters to be updated.The results show that the cumulative distribution function and probability density function of the model prediction re-suits and the test results are consistent,which proves the effectiveness of the uncertainty evaluation and updating method for the stiffened composite panel.

关 键 词：复合材料 加筋壁板 模型修正 不确定性 

分 类 号：TB3[一般工业技术—材料科学与工程]