摘要
针对电站管道带台阶不规则接头的相控阵超声检测时,存在声束传播复杂、工艺设计和信号源分析困难等问题,首先建立了相控阵声束在管道不规则接头中的传播模型;其次利用该模型计算和分析了典型斜台结构对声束的遮挡、探头最佳入射点、内斜台产生反射声束的偏转方向等影响;最后利用该模型对现场管道三通与弯头处不规则接头相控阵超声检测工艺及结果进行辅助分析。结果表明:所提出的声线分析模型可以准确评估内外斜台对声束传播造成的影响,预测结构回波,为相控阵超声检测管道不规则接头的工艺和信号分析提供了重要的依据。
The phased array ultrasonic test of the irregular structures of welds with the tilt parts in power plant is difficult because of the complexity on the procedure design and signal analysis.Firstly,the acoustic line model for the propagation of phased array ultrasonic filed in the weld of irregular structures is established based on Snell law.Secondly,the model is used to calculate and analyze the influence of the tilt parts on the shielding beams,incident points,reflection beams.Finally,the model was applied to analyze the ultrasonic phased array testing process and the results of the in-situ irregular structures of welded joint at the tee bend and elbow.The results indicate that the established model provide an efficient tool for the procedure design and signal analysis of the phased array ultrasonic testing of the irregular structures of welds.
出处
《无损检测》
2015年第11期78-81,83,共5页
Nondestructive Testing
关键词
管道不规则接头
相控阵超声检测
声线模型
斜台
Irregular structure of pipline
Phased array ultrasonic testing
Acoustic line model
Tilt parts
