摘要
以悬臂梁为研究对象,在其上进行损伤模拟。应用有限元程序进行模态分析,模态分析的结果表明第一阶振型改变率对不同位置和程度损伤的敏感性。提出以第一阶振型改变率作为结构损伤识别的标识量。应用神经网络,成功地识别了损伤的位置和程度,指出其可行性。
Damages on a cantilever beam are simulated. The vibration mode analysis is made by using a commercial finite element software, and the analysis shows the sensitivity of the change rate of the first order mode shape to the location and the severity of structure damages. Hereby, the change rate of the first order mode shape is presented as the indicator for structure damage detection. A successful identification of the location and the severity of a structure damage is achieved by using the artificial neural network.
出处
《航空学报》
EI
CAS
CSCD
北大核心
2003年第5期422-426,共5页
Acta Aeronautica et Astronautica Sinica
关键词
结构损伤
模态参数
损伤标识量
神经网络
仿真
Finite element method
Neural networks
Structures (built objects)
Vibrations (mechanical)
