基于小波包的爆炸容器振动分析

Vibration analysis of an explosion vessel based on wavelet packet transform

首先介绍了小波分析与小波包分析的原理和特点,然后给出了实际的爆炸容器振动的实验测试结果,最后应用小波包分析计算了其振动分量的时频分布情况,并对时频分析结果进行了讨论。分析结果表明,爆炸容器的振动信号能量分布处于较宽的频带范围,振动能量随时间变化的发展出现剧烈的变化,隔震沟衰减了信号主要频带范围内97%的能量。

The wavelet packet transform,in which the wavelet DB8 was chosen as the basis function,was applied to analyze the vibration signals of a 25-kg-TNT-equivalent explosion vessel.And the principle and characteristics of wavelet packet analysis were introduced and the experimental vibration acceleration signals of the explosion vessel were presented.The time-frequency distributions of the experimental signals were calculated by the wavelet packet method.The results show that the energy distribution of vibration of the explosion vessel has a very wide frequency range and fluctuates intensely,and the quakeproof trench attenuates approximately 97% of the vibration energy.