基于PZT的金属结构焊缝裂纹检测仿真研究

摘要

The damage of crane metal structure generally appears in the weld .Crack is one of the most harmful and common damage .Adopt the impedance method and use ANSYS to do harmonic response analysis to steel plate with weld and use the RMSD index method to make study of the weld crack damage recognition and location recognition .The result of simulation indicates that the piezoelectric admittance spectrum is sensitive to the depth of crack and the distance between crack and PZT .The result presents certain regularity .The impedance method can be used to analyze the damage level and the location recognition of crack .%起重机金属结构的损伤一般出现在焊缝处，裂纹是损伤中危害最大和最普遍的一种。应用压电阻抗法并借助ANSYS仿真软件对带焊缝钢板进行谐响应分析，采用RMSD指数法研究了基于PZ T传感器的焊缝裂纹损伤程度和定位方法识别。仿真结果表明，压电导纳频谱曲线对裂纹深度和裂纹与PZ T的偏移距离很敏感，呈现出一定的规律性。压电阻抗法可以用于对焊缝裂纹损伤程度和裂纹位置识别的分析。