多层包扎式高压容器声发射检测中突发信号的处理分析  

HANDLING AND ANALYSIS OF BURST SIGNAL IN ACOUSTIC EMISSION DETECTION OF WELD-SHRUNK MULTILAYERED HIGH-PRESSURE VESSELS

作　　者：田亚团 Tian Yatuan(SINOPEC Engineering Quality Monitoring Co.,Ltd.,Beijing,100101)

机构地区：[1]中石化工程质量监测有限公司,北京100101

出　　处：《石油化工设备技术》2024年第3期40-43,I0003,共5页Petrochemical Equipment Technology

摘　　要：文章介绍了某在用多层包扎式高压容器声发射检测中出现突发信号时的处理与分析过程。该高压容器的声发射检测采用与耐压试验同时进行的2次加压循环方式。在第二阶段保压状态下,容器上两处位置突然出现大量声发射信号。为了判别该突发信号的性质,检测团队在第二阶段保压过后增加了1个降压-升压-保压的过程,通过对声发射监测信号特征参数、源区定位以及容器结构特点、升压过程中的应力应变行为等因素进行综合判断,最终得出如下结论:两处突发信号是由第1次升压过程中变形不充分的部位在第2次保压过程中层板间相互协调变形趋于一致时导致层板间产生摩擦而引起的。该结论可为声发射检测时出现类似的现象提供了参考。This paper presented the handling and analysis of unexpected acoustic emission signals during the acoustic emission testing of a weld-shrunk multilayered high-pressure vessel in service.The testing was conducted using a two-stage pressurization cycle concurrent with the pressure resistance test.During the second stage of pressure retaining,a substantial amount of acoustic emission signals suddenly appeared at two positions on the container.In order to discern the nature of these abrupt signals,the inspection team introduced an additional decompression-pressure boosting pressure retaining phase following the second stage of pressure retaining.By conducting a comprehensive assessment including the characteristic parameters of the monitored acoustic emission signals,source region localization,as well as factors associated with the container's structural attributes,stress-strain behavior during the pressurization process,and inter-layer interactions,it was ultimately concluded that the two instances of sudden signals were caused by insufficient deformation in certain areas during the first pressurization stage,which led to friction between the layers as they underwent coordinated deformation towards uniformity during the subsequent maintenance pressure phase.The conclusion may provide reference for the occurrence of similar phenomena during acoustic emission inspection.

关 键 词：多层包扎容器 声发射检测 突发信号 变形协调 

分 类 号：TH49[机械工程—机械制造及自动化]