小波分析在复合材料层合结构损伤检测中的应用

Wavelet Analysis in Damage Detection for Laminated Composite Structure

利用小波变换技术 ,研究了含裂纹悬臂复合材料层合结构的损伤振动检测问题。用小波分析技术分解完好板与损伤板在方波信号激励下的动力响应信号 ,得到一系列子信号 ,并从中提取出结构损伤信息—响应信号能量谱 。

Vibration-based detection of crack damage for a cantilever laminated composite structure is studied with Wavelet Transform. The dynamic response signals under excitation of a square wave signal are calculated. Sub-signals are decomposed from dynamic response signals with the aid of wavelet analysis technology, and damage information, i.e., the energy spectrum of response signals, is extracted.