摘要
该文阐明了简谐激振法的识别原理。将框架结构简化为串联多自由度体系,对该体系的运动微分方程进行傅里叶变换,得出刚度识别公式,在此基础上进行了计算机仿真分析。结果表明,该方法能较准确地识别结构的刚度参数,具有良好的容错性,在结构动力检测方面具有一定的应用价值。
The identification principle of simple harmonic excitation method is illustrated. Based on the fact that frame structures can be simplified to series multi-degree-of-freedom systems, the stiffness identification formula was derived through fourier analysis of the structure vibration equation. Numerical simulations were carried to validate identification formula using simulated noise-free data and simulated noisy data. The results show that the method can identify the stiffness parameters of frame structure accurately and has a good fault tolerance. The method has certain application value in structure dynamic test.
出处
《南京理工大学学报》
EI
CAS
CSCD
北大核心
2005年第1期102-104,共3页
Journal of Nanjing University of Science and Technology
关键词
刚度识别
傅里叶变换
框架结构
简谐激振
stiffness identification
Fourier analysis
frame structure
simple harmonic excitation
