CAJ | 학술논문

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。
침대전참관도대태계불규칙접두적상공진초성검측시，존재성속전파복잡、공예설계화신호원분석곤난등문제，수선건립료상공진성속재관도불규칙접두중적전파모형；기차이용해모형계산화분석료전형사태결구대성속적차당、탐두최가입사점、내사태산생반사성속적편전방향등영향；최후이용해모형대현장관도삼통여만두처불규칙접두상공진초성검측공예급결과진행보조분석。결과표명：소제출적성선분석모형가이준학평고내외사태대성속전파조성적영향，예측결구회파，위상공진초성검측관도불규칙접두적공예화신호분석제공료중요적의거。
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.