12MnNiVR钢拉伸过程声发射信号特征分析

摘要/Abstract

摘要： 对大型常压储罐材料12MnNiVR钢拉伸过程中声发射信号的幅值、振铃计数、撞击计数和能量等常规特征参数进行了分析。在此基础上，对拉伸过程不同阶段典型声发射信号的时域波形、频谱、希尔伯特时频分布等进行了波形分析。结果表明，声发射信号的特征参数和波形分析能反映不同拉伸过程变形特征，可用于拉伸过程的表征。

关键词: 大型常压储罐, 声发射, 特征参数, 希尔伯特-黄变换

Abstract: Several methods of characteristic parameter analyses were introduced to analyze AE signals in stretching process of 12MnNiVR steel used in large atmospheric tank. These parameters included signal amplitudes, counts, hits and energy. Furthermore, the stretching process at different stages of a typical AE signal waveforms were also analyzed including time-domain waveform, spectrum, Hilbert time-frequency distribution etc. The results show that the characteristic parameters and waveform analysis of AE signals may reflect the different characteristics of the tensile deformation stages. AE technique can be used to characterize material stretching processes.

Key words: large atmospheric tank, acoustic emission(AE), characteristic parameter, Hilbert-Huang transform(HHT)

中图分类号:

TG156

李光海, 焦敬品, 王新健, 何存富, 吴斌. 12MnNiVR钢拉伸过程声发射信号特征分析[J]. 中国机械工程.

Li Guanghai, Jiao Jinping, Wang Xinjian, He Cunfu, Wu Bin. Acoustic Emission Behavior of 12MnNiVR Steel under Stretching[J]. China Mechanical Engineering.

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