Linear annular path damage probability distribution based ultrasonic guided wave method for position imaging and tracking of multi-damage on plate-like carbon fiber composite structure
Linear annular path damage probability distribution based ultrasonic guided wave method for position imaging and tracking of multi-damage on plate-like carbon fiber composite structure
复制标题
基于线性环形路径损伤概率分布的超声导波法板状碳纤维复合材料结构多损伤位置成像与跟踪
DOI：
10.1016/j.tws.2022.110362
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发表时间：
2023-02
影响因子：
6.4
通讯作者：
Mingshun Jiang
中科院分区：
文献类型：
--
作者：
Shanshan Lv;Xiaoshu Qin;Juntao Wei;Lingyu Sun;Lei Zhang;Qingmei Sui;Mingshun Jiang
板状碳纤维复合材料是航天器和高速列车主承力结构的重要组成部分，在减轻自重、降低能耗、提高承载能力等方面具有显著优势。但是，由于长期暴露在复杂的服役环境中，材料性能会发生变化，这些变化积累到一定程度会导致结构损坏，威胁设备运行和人身安全。为便于掌握结构的健康状态，提出了一种基于线性环形路径损伤概率分布和超声导波的复合材料板状结构损伤位置成像与跟踪技术。首先，根据频散曲线，分析了导波在复合材料结构上的传播速度特性。然后，结合有限数量的测量传播速度，在每个方向上的A0模式的群速度进行拟合。基于拟合的速度，可以预先构建每条路径上的所有搜索点的飞行时间（TOF）图。随后，将损伤TOF与绝对TOF差值阈值相结合，得到各传感路径的环形损伤概率分布图，最终将路径损伤概率相加得到整个监测区域的总损伤概率，能够直观反映当前损伤位置。实验结果表明，该方法在单点或多点损伤位置的成像与跟踪方面具有明显的优势。希望本文的研究结果能为复合材料结构的长期损伤状态监测提供新的思路。
Plate-like carbon fiber composite is an important component of the main bearing structure of spacecraft and high-speed trains, which has significant advantages in reducing the dead weight and energy consumption, and improving the carrying capacity. However, due to long-term exposure to complex service environments, material properties will be changed, these changes accumulated to a certain extent will lead to structural damage, threatening equipment operation and personal safety. To facilitate the attainment of mastering structural health states, this paper proposes a damage position imaging and tracking technology based on linear annular path damage probability distribution and ultrasonic guided wave for composite plate-like structures. Firstly, according to the dispersion curve, the propagation velocity characteristics of guided wave on composite structure are analyzed. Then, combined with the limited number of measured propagation velocities, the group velocity of the A0 mode in each direction is fitted. Based on the fitted velocity, the time-of-flight (TOF) map for all search points on each path can be pre-constructed. Subsequently, the damage TOFs and absolute TOF difference threshold are combined to obtain the annular damage probability distribution map of each sensing path. Ultimately, the total damage probability of the whole monitoring region is obtained by summing up the path damage probability, which can directly reflect the current damage position. Experimental results show that the proposed method has obvious advantages in imaging and tracking of single or multiple damage positions. It is hoped that the findings in this paper can provide new ideas for long-term damage state monitoring of the composite structures.
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