Study on Metal Structure Damage Identification Based on Dynamic Strain Monitoring Using Fiber Bragg Grating Sensor
HUANG Bo, BAI Shengbao, NING Ning, YANG Yu, XIAO Yingchun
( Aeronautics Science and Technology Key Laboratory of Full Scale Aircraft Structure and Fatigue,
AVIC Aircraft Strength Research Institute, Xi’an 710065, China )
The identification of early partial damage in critical parts is of great significance for the safety of the structure. The early detection of the damage can provide basis and support for the use and maintenance of the structure. The dynamic strain of the structure is tested by fiber Bragg grating sensor. At the same time, the dynamic strain response characteristics of the structure are extracted by using the strain modal identification technique. A damage identification index is proposed based on strain response characteristics to identify the damage degree and location. The experimental results show that the dynamic strain response is sensitive to the local damage, and the damage identification index can reflect the degree and location of damage, which can achieve the purpose of structural early damage identification.
黄 博,白生宝,宁 宁,杨 宇,肖迎春. 基于FBG动态应变监测的金属结构损伤识别方法研究[J]. 航空制造技术, 2017, 60(19): 67-71.
HUANG Bo, BAI Shengbao, NING Ning, YANG Yu, XIAO Yingchun. Study on Metal Structure Damage Identification Based on Dynamic Strain Monitoring Using Fiber Bragg Grating Sensor. Aeronautical Manufacturing Technology, 2017, 60(19): 67-71.