| 张松,李建乐,柳敏静,徐浩,杨雷,武湛君.基于分布式光纤静态应变测量的蜂窝夹层板脱粘损伤模型修正方法[J].,2023,63(6):584-591 |
| 基于分布式光纤静态应变测量的蜂窝夹层板脱粘损伤模型修正方法 |
| Model modification method of honeycomb sandwich panel debonding damage based on distributed optical fiber static strain measurement |
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| DOI：10.7511/dllgxb202306005 |
| 中文关键词:分布式光纤蜂窝夹层板静态应变模型修正损伤定量 |
| 英文关键词:distributed optical fiberhoneycomb sandwich panelstatic strainmodel modificationdamage quantification |
| 基金项目:国家重点研发计划资助项目(2022YFB34025002018YFA0702800)；国家自然科学基金资助项目(12072056). |
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| 中文摘要: |
| 脱粘损伤作为蜂窝夹层板最主要的损伤之一，由于难以被肉眼直接察觉，严重影响飞行器运行安全．为此提出了一种基于分布式光纤静态应变测量的蜂窝夹层板脱粘损伤模型修正方法．通过在铝蜂窝夹层板内部埋入分布式光纤网络来接收结构件的应变响应信号；采用间隙平滑方法，对测量路径的应变信号进行二阶拟合，将拟合结果插值到二维空间得到基准信号；通过构建损伤因子并设置阈值来划定损伤识别区域；基于滑窗扫描的虚拟损伤建模来确定损伤定量信息；通过对虚拟损伤模型进行有限元模拟获取模拟信号，并利用相关性分析方法找出相关性最高的含损数值模型，实现蜂窝夹层板的损伤信息量化表征以及结构状态的同步演化和性能预测．在铝蜂窝夹层板上对静力有限元模型修正方法进行了验证，实验结果表明此种方法适用于蜂窝夹层板损伤参数的量化识别和模型状态演化． |
| 英文摘要: |
| As one of the most significant damages of honeycomb sandwich panel, debonding damage is difficult to be detected directly by naked eye, which seriously affects the safety of aircraft operation. So a model modification method for debonding damage of honeycomb sandwich panel based on distributed optical fiber static strain measurement is proposed. A distributed optical fiber network is embedded in the aluminum honeycomb sandwich panel to receive the strain response signals of structures. The gap smoothing method is adopted to perform the second-order fitting on the strain signal of the measurement path, and the fitting result is interpolated into the two-dimensional space to obtain the reference signals. The damage identification area is defined by constructing damage factors and setting thresholds. The damage quantitative information is determined by the virtual damage modeling based on the sliding window scanning. The simulation signal is obtained by the finite element simulation of the virtual damage model, and the correlation analysis method is used to find out the numerical model including damage with the highest correlation, so as to realize the quantitative characterization of the damage information of the honeycomb sandwich panel and the synchronous state evolution and performance prediction of the structure. The static finite element model modification method is verified on the aluminum honeycomb sandwich panel, and the experimental results show that this method is suitable for the quantitative identification of damage parameters of honeycomb sandwich panels and state evolution of model. |
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