Damage localization method for plate-like composite structure based on valid path optimization and search point matching
Damage localization method for plate-like composite structure based on valid path optimization and search point matching
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基于有效路径优化和搜索点匹配的板状复合结构损伤定位方法
DOI：
10.1016/j.ymssp.2022.109562
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发表时间：
2023
影响因子：
8.4
通讯作者：
Mingshun Jiang
中科院分区：
文献类型：
--
作者：
Shanshan Lv;Juntao Wei;Mingshun Jiang
为了提高复合材料结构损伤定位的精度和效率，提出了一种有效路径优化与搜索点匹配相结合的改进能量定位方法。该方法首先根据健康信号和损伤信号计算损伤指数（DI），然后结合基于健康信号设置的DI阈值，得到有效的传感路径。然后，通过比较搜索点的飞行时间（TOF）与损伤的飞行时间，过滤掉无效的搜索点。最后，每个有效搜索点的累积能量可以基于其TOF和有效感测路径上的散射信号来计算。将能量集中最大区域的几何中心作为损伤位置。通过构建实验系统验证了该方法的性能。实验结果表明，对于450 mm × 450 mm × 2.4 mm和800 mm × 800 mm × 2.4 mm的复合材料层合板，该方法的平均绝对定位误差分别为2.69 mm和5.00 mm，最大定位误差分别为8.85 mm和11.66 mm。该研究为复合材料结构的损伤检测提供了一种新的思路。
In order to improve the damage localization accuracy and efficiency of composite structures, an improved energy positioning method combining valid path optimization and search point matching is proposed in this paper. Firstly, the damage index (DI) can be calculated according to the healthy and damaged signals, and the valid sensing paths are then obtained by combining the DI threshold set based on the healthy signal. Then, the ineffective search points are filtered out by comparing the time-of-flight (TOF) of search points with that of the damage. Finally, the accumulated energy for each effective search point can be calculated based on its TOF and the scattered signals on valid sensing paths. The geometric center of the region with the greatest energy concentration is considered as the damage position. The performance of the proposed method was verified by constructing experimental system. Experimental result shows that for 450 mm × 450 mm × 2.4 mm and 800 mm × 800 mm × 2.4 mm composite laminates, the average absolute positioning errors obtained by the proposed method are 2.69 mm and 5.00 mm respectively, and the maximum positioning errors are 8.85 mm and 11.66 mm respectively. This study can provide a new idea for damage detection in composite structures.
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