Online acoustic emission diagnosis technology for twin corrosion in sluice metal structures
水闸金属结构孪生腐蚀的声发射在线诊断技术

摘要

水闸金属结构在长期服役过程中常因复杂水环境和载荷作用而产生孪生腐蚀，导致结构安全性下降与使用寿命缩短。声发射技术作为一种灵敏的无损检测手段，能够在腐蚀早期通过捕捉微弱能量释放信号实现在线诊断，突破了传统检测方法滞后、局限性大的问题。本文以水闸金属结构为研究对象，围绕孪生腐蚀机理与声发射特征展开分析，建立声发射信号参数与腐蚀发展过程之间的对应关系，并构建在线监测与识别模型，实现腐蚀状态的实时感知与预警。该方法能够有效提高水闸运行安全管理水平，为工程设施健康监测与寿命预测提供重要参考，具有较强的工程应用前景和推广价值。

Abstract

In the long-term service of sluice metal structures, twin corrosion frequently occurs under the influence of complex aquatic environments and load actions, leading to reduced structural safety and shortened service life. Acoustic emission technology, as a sensitive non-destructive testing method, enables online diagnosis at the early stage of corrosion by capturing weak energy release signals, thus addressing the issues of lag and significant limitations associated with traditional testing methods. This paper takes sluice metal structures as the research subject, conducts an analysis focusing on the mechanism of twin corrosion and acoustic emission characteristics, establishes the corresponding relationship between acoustic emission signal parameters and the corrosion development process, and constructs an online monitoring and identification model to achieve real-time detection and early warning of corrosion conditions. This method can effectively enhance the safety management level of sluice operation, provide important references for the health monitoring and service life prediction of engineering facilities, and possesses strong prospects for engineering application and popularization value.