基于CIVA的覆有涂层叶片涡流检测仿真与POD分析

Simulation and POD Analysis of Eddy Current Detection of Coated Blade Based on CIVA

航空发动机叶片在制造中通常在其部件表面涂覆有涂层以延长发动机寿命,模拟某型发动机叶片的典型疲劳裂纹损伤,运用CIVA仿真技术进行涡流检测仿真试验,验证涂层对涡流检测的影响。运用数值模拟的方法,以缺陷深度为特征参量,涂层厚度为不确定量,进行POD分析,并研究涡流提离效应和趋肤效应对检测可靠性的影响及对策,进一步验证涡流检测技术在覆有涂层叶片缺陷检测中的可行性与可靠性。

Aero-engine blades are usually coated on the surface of their parts in manufacture to prolong the engine life.This paper simulates the typical fatigue cracking damage of certain engine blades,uses the CIVA simulation technology to conduct the eddy current detection simulation test to verify the effect of coating on eddy current detection.Using the method of numerical simulation,taking the defect depth as a characteristic parameter and the thickness of the coating as the uncertainty,the POD analysis is carried out.The influence and measures of eddy current lift-off effect and the skin effect on detection reliability are studied to further verify the feasibility and reliability of eddy current testing technology in the detection of coated blade defects.