【摘要】 基于小波包、分形技术的相似性,提出采用小波包、分形组合技术对爆破振动信号进行组合分析。采用小波包对爆破振动信号进行分解,通过各主分析小波包的重构系数验证了爆破振动信号的分形特性,通过对各主分析小波包的盒维数值进行分析及对比,更加细致地分析出爆破振动信号不同频带分量分形维数的变化。组合分析表明,盒维数值随着爆破振动信号小波分量频率高低而变化,提出将盒维数作为反映爆破振动信号频率成分的一个重要参量。小波包与分形组合分析技术的提出为研究爆破振动信号分形特征提供了新的研究思路。更多还原

【Abstract】 Based on the comparability of wavelet packet and fractal technology,wavelet packet and fractal combination technology was proposed to analyze blasting vibration signals.Using wavelet packet to decompose blasting vibration signals,through analyzing the main wavelet packet reconstruction coefficients of blasting vibration signals,their fractal characteristics were verified,through analyzing and comparing the box-counting dimensions of the main wavelet packets, the fractal dimension changes of different frequency components of blasting vibration signals could be analyzed further.The combination analysis showed that the box-counting dimension changes with the frequency of wavelet components of blasting vibration signals,so the box counting dimension is an important parameter which reflects frequency characteristic of blasting vibration signals.Wavelet packet and fractal combination technology provided a new idea for fractal features study on blasting vibration signals.更多还原