Page 38 - 《应用声学》2023年第4期

第 42 卷 第 4 期 Vol. 42, No. 4
2023 年 7 月 Journal of Applied Acoustics July, 2023

⋄ 研究报告 ⋄

三点弯曲试验条件下花岗岩声发射横纵波

特征及损伤演化 ∗

梁 鹏 1,2† 刘俊岭 3 李 壮 1 何吉民 1

(1 华北理工大学矿业工程学院 唐山 063210)
(2 河北省矿山绿色智能开采技术创新中心 唐山 063210)
(3 华北理工大学以升创新教育基地 唐山 063210)
摘要：开展花岗岩三点弯曲试验，利用横纵波两种传感器接收花岗岩破坏过程的声发射信号，对比分析声发射
横纵波信号的时频特征，在此基础上，基于声发射横纵波建立损伤变量，探讨花岗岩三点弯曲条件下损伤演化
规律。研究结果表明：花岗岩破坏过程声发射横纵波事件率变化趋势较为相似，临近峰值载荷时均加速上升，
破坏时达到峰值，但纵波事件率加速点早于横波事件率；声发射横纵波能率变化趋势一致，呈现峰前低水平稳
定变化、峰后陡升到峰值的特征。声发射横纵波主频在临近峰值载荷逐渐形成主频条带，但其频率存在差异，
纵波主频分布在 0∼ 10 kHz、30∼ 50 kHz 和 100∼ 110 kHz，而横波主频集中分布在 0∼ 10 kHz。相比纵波损伤
变量，横波损伤变量能够刻画峰后损伤急速发展的过程，能较好地表征花岗岩三点弯曲作用下损伤变化规律。
关键词：三点弯曲试验；声发射；横波；纵波；时频特征；损伤演化
中图法分类号: TU45 文献标识码: A 文章编号: 1000-310X(2023)04-0700-10
DOI: 10.11684/j.issn.1000-310X.2023.04.005

Acoustic emission S-wave and P-wave characteristics and damage evolution of

granite under three-point bending test

LIANG Peng 1,2 LIU Junling 3 LI Zhuang 1 HE Jimin 1

(1 School of Mining Engineering, North China University of Science and Technology, Tangshan 063210, China)
(2 Mine Green Intelligent Mining Technology Innovation Center of Hebei Province, Tangshan 063210, China)
(3 Yisheng Innovation Education Base, North China University of Science and Technology, Tangshan 063210, China)

Abstract: The three-point bending test of granite was carried out, and acoustic emission signals of granite
failure process were received by using S-wave and P-wave sensors. The time-frequency characteristics of S-wave
and P-wave signals of acoustic emission signals were compared and analyzed. On this basis, damage variables
were established based on acoustic emission S-wave and P-wave to discuss the damage evolution law of granite
under three-point bending conditions. The results show that the variation trend of acoustic emission S-wave
and P-wave event rates in granite failure process is similar. While approaching the peak load, the AE signal
increases rapidly and reaches the peak value when damage occurs. However, the acceleration point of P-wave
event rate appears earlier than that of S-wave event rate. The variation trend of S-wave and P-wave energy
rate of acoustic emission is consistent, showing the characteristics of stable change at low load before the maxim

2022-04-20 收稿; 2022-06-14 定稿
国家自然科学基金项目 (51904105), 河北省自然科学基金项目 (E2021209052), 大学生创新创业训练计划项目 (X2022127)
∗
作者简介: 梁鹏 (1987– ), 男, 河南南阳人, 硕士, 讲师, 研究方向: 岩石力学, 声发射监测。
† 通信作者 E-mail: hnlp87@163.com