基于平均频率和HHT变换的隧道爆破震动信号研究

发布时间：2018-05-17 17:30

本文选题：爆破震动 + 平均频率　；参考：《矿业研究与开发》2017年07期

【摘要】：爆破地震波振速、频率和能量的传播规律一直是国内外相关学者研究的热点。以某实测信号为基础,首先基于萨道夫斯基公式构建了适宜本地区的振速衰减模型,研究结果表明场地地质条件较好;其次基于"平均频率"概念分析了其衰减模型,分析结果表明,爆破地震波三个分量中,垂直方向和水平切向的"平均频率"随着爆心距的增加表现出较好的规律性,而水平径向出现局部突变情况;最后基于HHT变换分析了距离爆源水平距离5,10,15,20,25 m处爆破地震波Hilbert能量及瞬时能量衰减规律,结果表明,Hilbert能量谱除局部表现出异常之外,整体表现为衰减趋势;瞬时能量谱则表现出较好的规律性,随着爆心距的增加,瞬时能量逐渐递减。
[Abstract]:The vibration velocity, frequency and energy propagation of blasting seismic wave have been the focus of the scholars at home and abroad. Based on a measured signal, the attenuation model of vibration velocity is constructed based on the Sadolski formula. The results show that the geological conditions of the site are good, and the attenuation model is analyzed based on the concept of "average frequency". The results show that the "average frequency" of the vertical direction and horizontal tangential direction of the three components of blasting seismic wave shows a good regularity with the increase of the distance of the blasting center, while the horizontal radial has a local mutation. Finally, based on the HHT transform, the attenuation law of Hilbert energy and instantaneous energy of blasting seismic wave at the horizontal distance of 5 ~ 10 ~ 1520 ~ 25 m from the explosion source is analyzed. The results show that the Hilbert energy spectrum shows a attenuation trend except for the local anomaly. The instantaneous energy spectrum shows good regularity, and the instantaneous energy decreases gradually with the increase of the distance between the detonation centers.
【作者单位】：浙江大学建筑工程学院;浙江大学城市学院土木工程系;
【基金】：国家自然科学基金项目(51408543)
【分类号】：U455.6

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