复合材料构件损伤类型识别的一种方法

An Approach for Damage Detection and Identification of Composite Components

复合材料构件在使用过程中会产生脱层、内部裂纹、裂缝等损伤，这些损伤会引起构件动态特性的变化。本文提出了通过测取构件的动态特性，结合波形分析和模式识别技术进行复合材料损伤检测和损伤类型识别的方法。在比较了飞机环境噪声信号和周期脉冲信号的优缺点的基础上，提出使用周期脉冲信号作为构件的激振信号，来进行构件动态特性的测量。本文的研究中制作了多种类型的损伤试件，进行了实验，已发现显著特征。

A dynamic approach for damage detection and identification of composite components is proposed. The approach is based on vibration test with the aid of waveform analysis and pattern recognition technique. Periodic pulse signals are used as exciting sources, and laminated beams with various pre-made damages are excited and examined in the test. Some clues which are helpful for damage detection and identification are found through appropriate data processing.