基于小波变换的打夯振动分析

Ramming Vibration Analysis Based on Wavelet Transform

探讨了冲击振动检测标准建立的合理性 ,提出使用小波的多通道分析功能来建立冲击振动检测标准的思想。回顾了有关振动检测标准的现状和小波分析的时频特性 ,分别从时域、频域和小波域对某打夯机造成的冲击振动进行分析 ,指出从时域和频域建立冲击振动检测标准的不足及从小波域建立冲击振动检测标准的优越性 ,验证了从小波域建立冲击振动检测标准的合理性和可能性。

This paper describes the rationality of establishment of shock vibration examining criterion and puts forward the idea of establishing shock vibration examining criterion based on multi-channel analyzing function of wavelet. First,the current state of certain vibration examining criterion and the time-frequency analysis character of wavelet are discussed.Then,the shortage of establishing shock vibration examining criterion from time domain or frequency domain and the merit of doing that from wavelet domain are presented through analyzing certain shock vibration caused by ramming from time domain, frequency domain and wavelet domain respectively.The result shows that it is reasonable and possible to establish shock vibration examining criterion from wavelet domain.