Vibration-based Damage Detection of Complex Structures with Engineering Applications

本研究的目的是开发新的基于振动的复杂结构损伤检测方法，并将其应用于新开发的空间框架风力涡轮机塔架、风力涡轮机叶片、斜拉索和周期性蜂窝材料等工程系统。将开发一种基于模型的稳健方法，该方法使用最小振动测量来检测具有不同类型接头（包括螺栓、焊接和铆接接头和干涉销）以及张紧钢丝绳的结构中的损坏位置和程度。将开发新方法来模拟各种类型的接头和张紧钢丝绳。将开发一种基于损伤敏感振动形状 (VS) 的方法，使用 3D 扫描激光振动计检测风力涡轮机叶片的损伤。定期监测复杂结构的健康状况可以提供结构的持续状态评估并避免其意外故障。基于模型和VS的损伤检测方法可用于监测安全关键结构的健康状况，例如风力涡轮机塔架和叶片、斜拉索和机身。该研究的各个方面将针对从高中生到博士生等各个级别的学生的教育目的进行调整。学生。一些有限元建模、动态测试和损伤检测结果将在暑期教育项目中向服务不足的高中生展示，以激发他们对科学和工程的兴趣。将组织有关建模、动态测试和损伤检测的各种研讨会，以扩大研究对科学界的影响，并将来自不同科学界的研究人员聚集在一起。

The objective of this research is to develop new vibration-based damage detection methods for complex structures and apply them to engineering systems such as the newly developed space frame wind turbine towers, wind turbine blades, stay cables, and periodic cellular materials. A robust model-based method that uses minimum vibration measurements to detect the locations and extent of damage in structures with different types of joints, including bolted, welded, and riveted joints and interference pins, and in tensioned wire ropes, will be developed. New methods will be developed to model various types of joints and tensioned wire ropes. A damage-sensitive vibration shape (VS)-based method will be developed to detect damage in wind turbine blades using a 3D scanning laser vibrometer.Monitoring the health of complex structures on a regular basis can provide a sustaining status assessment of structures and avoid their unexpected failure. The model- and VS-based damage detection methods can be used to monitor the health of safety-critical structures such as wind turbine towers and blades, stay cables, and airframes. Various aspects of the research will be adapted for educational purposes to students at all levels, from high school students to Ph.D. students. Some finite element modeling, dynamic testing, and damage detection results will be demonstrated to underserved high school students in a summer educational program to spark their interest in science and engineering. Various symposia on modeling, dynamic testing, and damage detection will be organized to broaden the impact of the research to the scientific community, and to bring together researchers from different scientific societies.