基于小波变换和模态声发射的304不锈钢点蚀声发射信号特性  

Research on Acoustic Emission Signals Characteristics of Pitting Corrosion on 304 Stainless Steel Based on Wavelet Transform and Mode Acoustic Emission

作　　者：蔡文生 

机构地区：[1]南京市锅炉压力容器检验研究院,江苏南京210002

出　　处：《石油化工设备》2013年第6期21-24,共4页Petro-Chemical Equipment

摘　　要：为了研究304不锈钢的点蚀声发射信号特性,应用小波变换和模态声发射技术对304不锈钢的点蚀声发射信号进行了分析,分析研究结果表明,点蚀信号波形主要是由能量较大的低频段弯曲波和能量较小的高频段扩展波构成的。研究结果对304不锈钢点蚀声发射监测具有一定的实际指导意义。In order to study acoustic emission （AE） signals waveform characteristics of pitting corrosion on 304 stainless steel, wavelet transform and mode acoustic emission technology were combined to deal with recorded AE signals. The results showed that signal waveform was mainly composed of low-frequency flexural wave with larger energy and high-frequency expansion wave with lesser energy. The research results have some certain significance for AE monitoring of pitting corrosion on 304 stainless steel.

关 键 词：304不锈钢 点蚀 小波变换 模态声发射 信号特性 

分 类 号：TG115.28[金属学及工艺—物理冶金]