简谐激振作用下框架结构刚度识别

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。

Stiffness Identification of Frame Structures under Simple Harmonic Excitation

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.