基于功率谱形心SWF的SRM复合材料壳体脱粘缺陷识别方法

摘要

针对SRM复合材料粘接结构间隙型脱粘和紧贴型脱粘的识别问题,运用声-超声的方法进行检测,在综合分析不同脱粘类型时域和频域波形的基础上,提出采用功率谱形心SWF表征脱粘类型.实验结果表明,功率谱形心SWF能有效地对两种脱粘类型进行识别.%The acousto-ultrasonic method was used for detecting gap-type debonding and close-type debonding of SRM composite shell. On the basis of comprehensive analysis of different debonding type and frequency domain waveforms, the power spectral centroid SWF method was put forward to characterize the debonding type. The experimental results show that the power spectral centroid SWF can effectively identify two types of debonding.