基于VMD-Teager的露天边坡爆破振动信号能量特征研究

徐振洋1,莫宏毅1,包松1,赵建宇1,王雪松2,刘鑫1,陈占扬3

振动与冲击 ›› 2023, Vol. 42 ›› Issue (7) : 77-88.

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振动与冲击 ›› 2023, Vol. 42 ›› Issue (7) : 77-88.
论文

基于VMD-Teager的露天边坡爆破振动信号能量特征研究

  • 徐振洋1,莫宏毅1,包松1,赵建宇1,王雪松2,刘鑫1,陈占扬3
作者信息 +

Energy characteristics of blast vibration signals of open-pit slope based on VMD-Teager

  • XU Zhenyang1, MO Hongyi1, BAO Song1, ZHAO Jianyu1, WANG Xuesong2, LIU Xin1, CHEN Zhanyang3
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文章历史 +

摘要

爆破振动信号特征分析是研究边坡稳定性的有效方法之一,结合模拟退火算法(Simulated Annealing, SA)局部搜索能力强和遗传算法(Genetic Algorithm, GA)全局自动寻优的特点,选取模糊熵(Fuzzy Entropy, FE)为模态分量的适应度函数,求解变分模态分解(Variational Modal Decomposition, VMD)的最优分解参数,建立以模态分量(Intrinsic Modal Function, IMF)的频带分布为指标、趋势项判别准则及复相关系数原理相结合的趋势项去除方法;Teager能量算子解调单分量信号的解调速度、精度均高于Hilbert变换。综上,提出了基于趋势项滤除的VMD-Teager能量算子解调法,用来获取爆破振动信号的能量分布特征。某矿山测得爆破振动信号分析结果表明:与EMD法相比,基于参数优化VMD算法在去除信号趋势项方面更精确有效,能够解决原始振动信号中存在的基线偏移及低频干扰等问题。爆破振动能量以低频为主,PPV、主频率、能量呈现出了“波浪”式的变换态势。PPV、主频率的衰减速度与放大系数在同一量级,但能量峰值的衰减速度与放大系数都远远大于PPV、主频率的变化速度,是PPV、主频率衰减速度的3.42~5.9倍,放大系数的2.07~3.12倍。
关键词:爆破振动;变分模态分解;Teager;趋势项;能量分布

Abstract

The characteristic analysis of blasting vibration signal is one of the most effective methods to study slope stability. Combining the strong local search ability of Simulated Annealing (SA) and the characteristics of global automatic optimization of Genetic Algorithm (GA). Fuzzy Entropy (FE) is selected as the fitness function of the modal component. Solve the optimal decomposition parameters of Variational Modal Decomposition (VMD). And then, by combing the Intrinsic Modal Function (IMF), criterion of trend item and complex correlation coefficient principle, the propose a trend term removal method. Since the Teager energy operator demodulation of single component signal has higher demodulation speed and accuracy than Hilbert transform. The VMD-Teager energy operator demodulation method based on trend term filtering is proposed, to obtain the energy distribution characteristics of blast vibration signals. The result demonstrates that VMD is more accurate and effective than EMD in removing signal trend terms. It can solve the problem, such as baseline deviation and low frequency interference existing in original vibration signal. The blasting vibration energy is mainly low frequency. PPV, primary frequency and energy perform a “W” pattern of transformation. The attenuation speed of PPV and primary frequency is in the same order of magnitude as the amplification coefficient. However, the attenuation speed and amplification coefficient of the energy peak are much higher than the variation speed of PPV and primary frequency, which are 3.42 ~ 5.9 times of PPV and primary frequency, and 2.07 ~ 3.12 times of amplification coefficient.

关键词

爆破振动 / 变分模态分解 / Teager / 趋势项 / 能量分布

Key words

blasting vibration / Variational Mode Decomposition / Teager / trend term / energy distribution

引用本文

导出引用
徐振洋1,莫宏毅1,包松1,赵建宇1,王雪松2,刘鑫1,陈占扬3. 基于VMD-Teager的露天边坡爆破振动信号能量特征研究[J]. 振动与冲击, 2023, 42(7): 77-88
XU Zhenyang1, MO Hongyi1, BAO Song1, ZHAO Jianyu1, WANG Xuesong2, LIU Xin1, CHEN Zhanyang3. Energy characteristics of blast vibration signals of open-pit slope based on VMD-Teager[J]. Journal of Vibration and Shock, 2023, 42(7): 77-88

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