Precise Analysis of Full-band Time-frequency Characteristic of Blasting Vibration Based on Wavelet Packet Transform
Full-frequency band time-frequency characteristic of blasting vibration being a nonstationary random process with short duration by means of wavelet packet precise analysis method is studied on this article. Firstly, the principle and characteristics of precise analysis based on wavelet packet are introduced. Then, the experimental results of a blasting vibration are presented, and their different time-frequency distributions of full-frequency band are calculated by wavelet packet precise decomposition method, then, the their threedimensional pictures of time-frequency distributions are drawn. Finally, through the discussion of the presented calculations, some features of energy distribution of blast vibration signals are indicated. It is shown the energy distribution of blasting vibration has a very wide frequency range with deterministic natural frequencies, and sharply fluctuates with time, and there are the bigger vibration elements of blasting vibration in the higher frequency range.
YAN Junwei LIANG Qiuxiang DU Fugui YANG Xusheng
Shensi Design Institute of Engineering and Scientific Research, Shenyang, Liaoning, 110162, China
国际会议
厦门
英文
448-452
2011-08-10（万方平台首次上网日期，不代表论文的发表时间）