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为了识别铝梁结构损伤位置,运用压电阻抗技术对铝梁进行了损伤定位试验研究.用精密阻抗分析仪在不同频率段下对无损及自制损伤孔两种情况下的阻抗实部信号进行测量,并用pearson相关系数处理试验数据,通过多次试验找到了阻抗实部相关系数值与压电陶瓷传感器(piezoceramic transducer,PZT)和损伤之间距离近似成线性关系的适测频率段.并在适测频率段内进行铝梁损伤定位试验,损伤孔及裂纹位置的探测值与实际值基本吻合,从而证实了该方法应用于铝梁损伤定位的有效性,可为无损检测的损伤定位提供参考.
In order to identify the damage location of the aluminum beam structure, the experimental research on the damage location of the aluminum beam was carried out by using the piezoelectric impedance technique, and the impedance real part signal was measured under different frequency bands by using a precision impedance analyzer , And the pearson correlation coefficient was used to process the experimental data. Through several experiments, the fittest frequency band with the approximate linear relationship between the value of the real part of the impedance and the PZT and the damage was found, The test of aluminum beam damage location in the frequency measurement frequency range, the detection value of the damage hole and crack location are basically consistent with the actual value, which proves the effectiveness of the method applied to the positioning of the aluminum beam damage, which can provide reference for the damage localization of the nondestructive testing.