Influence of measuring-point position setting on blasting vibration signals

摘要：

　　To study the similarities and differences between the blasting vibrations of surface and hole measuring points, the research selected the excavation engineering in Lishui and used the independently developed test collection device for underwater vibrations to detect the vibrations.Measuring points were set at equal distances from the blasting center to the hole bottom and surface, and the blasting vibration signals of the measuring points were collected.The comparison and analysis of peak vibration velocities and dominant frequencies in three directions at the measuring points revealed the close agreement of the velocity-time history and power-spectrum curves.The vibration frequency of surface measuring points lower than the vibration frequency of measuring points in the hole, but the difference was small.The instantaneous-energy spectrum of the two signals attained a high degree of coincidence with the three-dimensional power spectrum.The changes in blasting vibration energy and vibration frequency at the two measuring points are basically the same.

关键词： Blasting vibration HHT EMD Measuring-point position Vibration collection instrument

作者: Zhen-xiong WANG Wen-bin GU Lei LI Xin LIU Liu-fang YU Jing-lin XU

作者单位: Resarch Institute of Chemical Defense,Beijing, China Army Engineering University, Nanjing,Jiangsu, China

会议类型: 国际会议

会议名称: 2018 International Conference on Defence Technology (2018国际防务技术会议)

会议地点: 北京

会议语种:英文

页码: 714-720

在线出版日期: 2018-10-21（万方平台首次上网日期，不代表论文的发表时间）