【摘要】 依托临沂引水隧洞竖井爆破工程,通过Matlab语言编程对实测数据进行小波包分析,并利用修正萨道夫斯基公式(简称修正公式)对各个频带的信号进行了非线性预测分析,最终整合得到爆区内任意点的爆破振动信号波形的预测模型。分析发现,修正萨道夫斯基公式的预测精度明显高于传统的经验公式,且基于修正萨道夫斯基公式构建的多频带小波包系数波形预测模型的预测精度较高(幅值预测误差不足2%,主频预测误差6.5%),较单一衰减因子分析模型稳定。更多还原

【Abstract】 Based on the vertical shaft blasting project of the diversion tunnel in Linyi City,the wavelet packet analysis programmmed with Matlab was carried out to analyze the original measured data and the signals in various bands were predicted respectively with modified Sadaovsk Formula solved by nonlinear regression analysis,and then the blasting vibration waveform prediction model of any point in the blast area was obtained eventually.The analyses show that the prediction precision of modified Sadaovsk Formula is evidently higher than that of traditional empirical formula.And the prediction precision of multi-band wavelet coefficient waveform prediction model based on the modified Sadaovsk Formula is relatively higher(The prediction error of amplitude is less than 2% and that of dominant frequency is only 6.5%),which is more stable and reliable than the single attenuation factor analysis method.更多还原