摘要
对钢材试件疲劳裂纹开展水浸式非共线横波混频检测方法研究。利用搭建的水浸式非共线横波混频检测系统和极性反转信号处理方法,进行疲劳裂纹水浸式非共线横波混频检测试验,研究两列非共线横波相互作用角和频率比对混频效应的影响,在此基础上,开展疲劳裂纹二维自动化扫查检测研究。试验结果表明:极性反转法可有效提取检测信号中的混频效应;疲劳裂纹非共线横波混频检测的最佳相互作用角和频率比与经典非线性超声混频理论的谐振条件发生偏移;非共线横波混频二维扫查方法可对试件中疲劳裂纹进行定位和定量检测。研究工作为非共线超声混频检测方法的工程化应用作出了有益探索。
The water-immersion non-collinear shear wave mixing method was explored for fatigue crack detection.Using the developed water-immersion non-collinear shear wave mixing detection system and the signal processing method of polarity reversal,the experiments of fatigue crack inspection were carried out,and the influences of the two exciting waves’interaction angle and frequency ratio on wave mixing effect were studied.Then,the two-dimensional automatic scanning inspection was conducted on the sample blocks with fatigue crack.It is shown that the polarity reversal method can be used for wave mixing effect extraction.The optimal interaction angle and frequency ratio in the case of fatigue crack deviate from the resonance conditions of the classical nonlinear ultrasonic wave mixing theory.The fatigue cracks in the steel structure can be detected,located and quantified by using the two-dimensional scanning of non-collinear shear wave mixing.The work makes a beneficial exploration for the engineering application of the technique of nonlinear ultrasonic wave mixing.
作者
吕洪涛
焦敬品
王俊涛
刘志毅
李锋
张祥春
石亮
L Hongtao;JIAO Jingpin;WANG Juntao;LIU Zhiyi;LI Feng;ZHANG Xiangchun;SHI Liang(Testing and Damage Evaluation Center,AVIC China Aero-Polytechnology Establishment,Beijing 100028,China;Department of Materials and Manufacturing,Beijing University of Technology,Beijing 100124,China)
出处
《振动与冲击》
EI
CSCD
北大核心
2023年第14期204-210,244,共8页
Journal of Vibration and Shock
基金
民用飞机专项科研《民机质量、适航、事故调查体系研究(一期)-质量和可靠性保证体系研究》
国家自然科学基金(11972053)。
关键词
无损检测
疲劳裂纹
水浸
混频
非线性超声
non-destructive testing
fatigue crack
water immersion
wave mixing
nonlinear ultrasonic
