Vibration-based Damage Detection of Complex Structures with Engineering Applications

基于振动的复杂结构损伤检测及其工程应用

• 批准号: 1335024
• 负责人: Weidong Zhu
• 金额: $ 27.62万
• 依托单位: University of Maryland Baltimore County
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2013
• 资助国家: 美国
• 起止时间: 2013-09-01 至 2018-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1335024&HistoricalAwards=false
• 关键词: Vibration; based; Damage; Detection; Complex

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.

本研究的目的是开发新的基于振动的复杂结构的损伤检测方法，并将其应用于工程系统，如新开发的空间框架风力涡轮机塔，风力涡轮机叶片，斜拉索，和周期性蜂窝材料。一个强大的基于模型的方法，使用最小的振动测量，以检测不同类型的接头，包括螺栓连接，焊接，铆接接头和干扰销的结构中的损坏的位置和程度，并在张紧钢丝绳，将开发。将开发新的方法来模拟各种类型的接头和张紧钢丝绳。基于三维激光测振仪的风力机涡轮机叶片损伤检测方法，可以对复杂结构进行定期的健康监测，为结构的持续状态评估提供依据，避免结构的意外失效。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。研究的各个方面将适用于教育目的，以各级学生，从高中生到博士。学生一些有限元建模、动态测试和损伤检测结果将在夏季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。将组织关于建模、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，并将来自不同科学学会的研究人员聚集在一起。