无损检测——相控阵超声导波检测

[中文适用范围]： 本文件规定了相控阵导波检测在各种类型的不可接近结构（包括埋地管道）中的应用概念。考虑的材料是碳钢和不锈钢。本文件不包括地下设施的原则和标准以及相控阵超声导波检测方案。此外，本文件还包含一个优化流程，以得出不可接近管道案例的可靠测试结果。本文件为使用相控阵导波检测在各种类型的不可接近结构（包括由碳钢和不锈钢制成的埋地管道）提供指导。本文件中概述的方法包括一种优化流程，用于在不可接近管道案例上获得可靠的测试结果，并根据缺陷类型、位置和频率调整 GW 焦点位置的波束模式。该过程还考虑了导波的分布图和所选模式的特性，通过根据给定阵列探头的圆周排列间隔数调整每个换能器的激励时间延迟来实现最佳聚焦和转向。 [外文原描述]： This document specifies a concept of application of phased-array guided-wave testing for various types of inaccessible structures, including buried pipelines. Materials considered are carbon steel and stainless steel. This document does not include principles and criteria for underground facilities and the phased-array ultrasonic guided-wave testing scheme. Furthermore, this document consists of an optimized process to draw reliable test results on inaccessible pipe cases. This document provides guidance on the use of phased-array guided-wave testing for various types of inaccessible structures, including buried pipelines made of carbon steel and stainless steel. The methodology outlined in this document includes an optimized process for achieving reliable test results on inaccessible pipe cases, with adjustments made to the beam pattern of the GW's focus location based on the defect type, location, and frequency. The process also takes into consideration the distribution diagram of the guided waves and the characteristics of the selected mode, with optimal focusing and steering achieved by adjusting the excitation time delay for each transducer based on the number of circumferential arrangement intervals of a given array probe.