Volume 4,Issue 6
基于超声导波信号的复合材料铝蜂窝夹芯结构损伤检测
针对复合材料铝蜂窝夹芯结构损伤，本文首先通过有限元仿真软件建立复合材料铝蜂窝夹芯结构模型，并分别设置无损状态与含损伤状态，模拟导波在结构中的传播过程。激励信号采用中心频率为150kHz 的5周期汉宁窗调制正弦波，对比无损与损伤状态下信号波形的差异，再进行包络分析并通过时域能量计算构建损伤因子。制备含不同尺寸预制裂纹的试件，利用压电陶瓷传感器布置构成传感器检测路径，实现结构损伤检测。仿真和试验验证结果表明，上述方法能够有效诊断出复合材料铝蜂窝夹芯结构碳纤维面板损伤，构建的损伤因子与缺陷尺寸呈显著正相关。研究结果验证了导波反射特征在复合材料铝蜂窝夹心结构损伤识别中的应用潜力。
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