光纤分布传感激光兰姆波的复合材料夹芯结构成像检测方法

Composite sandwich structures are widely used for the manufacturing of load carrying structures of aircrafts. Many kinds of defects will be produced in these structures as they are in the course of service and under loading, which will seriously influence the performance and safe reliability of aircrafts. The existing visual and ultrasonic testing methods cannot realize the full scope and high resolution in situ testing of these structures. In order to solve this problem, an imaging testing method based on distributed optical fiber sensing of array laser generated lamb waves is proposed. The fiber grating sensing characteristics of lamb waves generated by array lasers, the response mechanism for the sensing of defects, the reconstruction and imaging of the dynamic lamb wave field, and the extraction and processing of defect images et al are studied. The imaging method based on array laser exciting and distributed fiber grating sensing of lamb waves is built. The innovations and contributions of this project will provide an effective method for the full scope, high precision and in situ testing and monitoring of large scale aircraft structures, which have a wide application prospect in aircraft manufacturing industry.

复合材料夹芯结构广泛用于飞机承力结构制造，此类结构在服役过程中受载荷作用会产生多种缺陷损伤，危及飞机性能和安全可靠性。现有目视、超声等检测方法难以对其进行全范围、高分辨的原位快速检测。为了解决这一问题，本项目提出一种阵列激光激励与光纤分布传感的激光兰姆波成像检测方法。通过研究阵列激光激励超声兰姆波的光纤光栅传感特性、缺陷损伤的传感响应机制与特征、动态兰姆波场的重构与成像方法、缺陷损伤特征图像的提取与处理方法等，建立基于阵列激光激励和光纤光栅分布传感的激光兰姆波成像检测方法。项目研究成果将为大型飞机结构的全范围、高分辨、原位快速检测与监测提供一种有效的新方法，在航空制造领域具有广阔的应用前景。

复合材料夹芯结构广泛用于飞行器承力结构制造，此类结构在服役过程中受载荷作用会产生多种缺陷损伤，危及飞行器性能和安全可靠性。现有目视、超声等检测方法难以对其进行全范围、高分辨的原位快速检测。针对这一问题，本项目提出一种基于阵列激光激励与光纤分布传感的激光兰姆波成像检测方法。通过研究阵列激光激励超声兰姆波的光纤光栅传感特性、缺陷损伤的传感响应机制与特征、动态兰姆波场的重构与成像方法、缺陷损伤特征图像的提取与处理方法等内容。取得创新性成果包括：（1）建立了基于激光兰姆波作用与光纤光栅传感的缺陷损伤响应机制模型；（2）建立了光纤光栅分布传感的动态激光兰姆波场重构算法；（3）建立了层状结构缺陷损伤二维特征成像及量化表征算法。项目研究成果为大型复合材料结构全范围、高分辨、原位快速检测与监测提供了一种新方法，在飞行器结构监测等领域具有广阔的应用前景。.代表性成果主要有：.（1）在国际知名期刊《Engineering》（中国工程院院刊，中科院分区1区TOP）上发表文章“Structural deformation monitoring of flight vehicles based on optical fiber sensing technology: A review and future perspectives”，该文与包为民院士、尤政院士、祝连庆教授等知名专家学者合作发表，本人为第二作者和共同通信作者。.（2）在《机械工程学报》发表封面文章，报道了基于光纤传感网的柔性变形机翼智能蒙皮研究成果，该文章被学报同步翻译成英文发表，并被中国科学家等专栏报道。.（3）基于多芯光纤传感网的飞行器柔性复合蒙皮参数监测方法相关研究成果发表在《Applied Optics》、《International Journal for Light and Electron Optics》等国际期刊，受到《Frontiers in Robotics and AI》期刊主编Paola Morelli等国际学者关注和好评，同时本人受Paola Morelli邀请担任《Frontiers in Robotics and AI》期刊客座编辑，负责组织专刊《Flexible Sensing and Intelligent Control for Morphing Aircrafts》。

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