Combined application of vibration testing and wavelet packet analysis on structural damage alarming
基于振动测试与小波包分析的结构损伤预警

The wavelet packet impulse response function and the wavelet packet energy spectrum of the structural dynamic system are proposed to identify the structural damage status, which is obtained by the wavelet packet decomposition of vibration exciting signals and response signals. Through an analysis of a reinforced concrete slab subjected to a series of static loading, the damage status of the slab during different loading phases is determined using the wavelet packet impulse response functions and the wavelet packet energy spectrum. The proposed method overcomes the shortcoming that the wavelet packet energy spectrum calculated directly from the structural dynamic response does not reflect the structural damage status and the experiment results have confirmed the feasibility of the method.