中文摘要：

目前国际上对薄膜涂层界面缺陷尚缺乏有效的探伤方法。本文基于薄膜涂层材料中波传播的模型，考察了在涂层表面施加冲击脉冲激发表面波，测取涂层表面各点的动态特性，结合波形分析技术进行界面缺陷检测的可行性。通过有限元模拟分析产生脉冲载荷并且激发表面波，对涂层表面接收的加速度波响应信号进行小波包数学变换，提取小波包相对能量谱变化率指标，发现加速度信号的小波包相对能量谱变化率指标在存在界面缺陷的区域有显著的变化，并且在缺陷中心区域效果最明显，而且该指标对不同薄膜厚度界面缺陷的具有敏感性，可以通过该指标较准确的判断裂纹的位置和尺寸。此项研究可以为开发薄膜涂层界面缺陷的无损检测方法提供一定的理论基础。

英文摘要：

There is still no effective detection method on the coating interface flaws internationally now. Based on the wave propagation model of coated material, the surface wave produced by pulse-wave was examined which is applied on the coating surface, the dynamic properties of the receivers along the surface were then collected, and the interracial crack was detected by waveform analysis. The surface wave was produced by pulse wave through the finite element simulation process, the acceleration signals received from the coat surface were transformed with wavelet package and the wavelet package energy was got. It finds that the change of wavelet packet energy is obvious at the interracial crack field, especially at the center of crack, and this parameter is sensitive to the flaws with different coat thickness, it＇s accurate to detect the location and size of crack by this parameter. This research provides the theoretical foundation for developing the nondestructive detection method of coat interface crack.