A study on the detection of corrosion in internal wires of horizontal cables on the Lupu bridge based on magnetostrictive ultrasonics
基于磁致超声的卢浦大桥水平索内部钢丝锈蚀检测研究

摘要

本文基于磁致超声导波测量技术，对卢浦大桥水平索内部钢丝的锈蚀状态进行检测与评估。提出磁致超声检测方法，利用磁致伸缩效应产生超声波，对水平拉索内部进行无损检测。为验证检测精度，采用开窗验证方法，通过对不同位置的钢丝样本进行多次检测，并与实际开窗状态进行对比分析。实验结果表明，该方法能够有效识别钢丝内部的锈蚀缺陷，并通过波形信号的特征分析实现锈蚀程度的定量评估。研究成果为大跨度桥梁拉索的锈蚀检测提供了一种新型、高效且经过验证的技术手段，具有重要的工程应用价值。

Abstract

This paper presents a study on the detection and assessment of corrosion in the internal wires of horizontal cables on the Lupu Bridge using magnetostrictive ultrasonic guided wave measurement technology. A magnetostrictive ultrasonic detection method is proposed, which utilizes the magnetostrictive effect to generate ultrasonic waves for non-destructive testing of the internal structure of the horizontal cables. To verify the accuracy of the detection, a windowed validation approach is employed, involving multiple tests on wire samples from different locations and comparative analysis with the actual windowed conditions. Experimental results demonstrate that this method effectively identifies corrosion defects within the wires and enables quantitative assessment of the corrosion degree through characteristic analysis of waveform signals. The findings provide a novel, efficient, and validated technological approach for corrosion detection in the cables of large-span bridges, offering significant value for engineering applications.