摘要
通过建立损伤指数与分层损伤参数间的定量关系,对复合材料加筋壁板分层损伤进行准确定量监测,提出了一种基于代理模型的分层损伤定量监测方法。该方法包括代理模型的建立和逆求解两个过程,通过插值拟合方法建立表征分层损伤参数与损伤指数间定量关系的多项式代理模型;采用损伤概率成像算法获得相对距离和损伤指数,将其代入代理模型中,得到所对应的分层损伤面积;实现对分层损伤进行定量评估的目的。通过一个复合材料加筋壁板分层损伤的定量监测实验,对所提方法的有效性进行了验证。结果表明:基于代理模型的复合材料分层损伤定量监测方法可以实现对分层损伤位置的准确定位,定位误差低于6%;且可实现对分层面积的准确定量评估,定量误差不超过5%。
In order to establish the quantitative relationship between the damage index and delamination damage parameters for accurately quantitative monitoring delamintaion damage on stiffened composite panel, a quantitative monitoring method based on surrogate model was proposed. The initial samples acquired by impact experiment were used to construct polynomial surrogate model via the interpolation algorithm to represent the quantitative relationship between the delamination damage parameters and damage index. The quantitative monitoring process of delamination damage was that probability-based diagnostic imaging algorithm was used to localize the delamination damage and to acquire the relative distance and damage index, then the damage area was optimized by the polynomial surrogate model based on damage index and relative distance. The validity of the proposed quantitative monitoring method was assessed by quantitative monitoring damages at different locations with different areas on a stiffened composite panel. The experiment results show that the proposed method can quantity identify the damage of stiffened compo-site panel accurately. The error of damage location is below 6%, and the error of damage area is below 5%.
作者
王莉
刘国强
肖迎春
WANG Li;LIU Guoqiang;XIAO Yingchun(Structural Damage Monitoring Laboratory,Aircraft Strength Research Institute of China,X i’an 710065,China)
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
2020年第2期302-308,共7页
Acta Materiae Compositae Sinica
基金
国家自然科学基金(16002237)
关键词
复合材料加筋壁板
定量监测
损伤指数
分层损伤参数
代理模型
损伤概率成像
stiffened composite panel
quantitative monitoring
damage index
delamination damage parameter
surrogate model
probability-based diagnostic damage imaging
