压力容器2025，Vol.42Issue(10)：78-86,9.DOI:10.3969/j.issn.1001-4837.2025.10.008
多边形截面波导杆的声发射信号衰减研究
Study on acoustic emission signal attenuation in polygonal cross-section waveguide rods
潘丛龙 1陈建义 1闫河 2陈彦泽 2刘昌旻1
作者信息
- 1. 中国石油大学(北京),北京 102249
- 2. 中国特种设备检测研究院,北京 100029
- 折叠
摘要
Abstract
To address the significant attenuation of acoustic emission signals in traditional cylindrical waveguide rods,the introduction of polygonal cross-sections with discrete symmetry alters their continuously symmetric boundary conditions,thereby regulating propagation modes,and lead break and fixed-frequency test systems were used to verify their performance.The results show that the signal attenuation rate of a heptagonal waveguide rod can be reduced to 25.55%,significantly lower than the 58.61%attenuation rate of a cylindrical rod;when the number of polygon sides n increases from 3 to 5,the attenuation rate decreases sharply due to optimized boundary conditions;for n≥5,the attenuation rate stabilizes as it tends to saturate due to the modal purification effect.This phenomenon reveals the intrinsic mechanism by which cross-sectional shape suppresses attenuation by balancing modal purification and boundary scattering,providing a theoretical basis and design guidelines for waveguide rod design in acoustic emission monitoring systems under complex working conditions.关键词
声发射/波导杆/信号衰减/多边形/边界条件Key words
acoustic emission/waveguide rod/signal attenuation/polygon/boundary condition分类
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潘丛龙,陈建义,闫河,陈彦泽,刘昌旻..多边形截面波导杆的声发射信号衰减研究[J].压力容器,2025,42(10):78-86,9.
