摘要
轮对的扁疤在列车行驶过程中,对轮轨产生间歇性的脉冲激扰源。当车轮滚至扁疤处时,产生的附加冲击力比正常时大几倍甚至十几倍。运用小波变换及小波包对平轮信号进行分析,可以找出能量与各频段之间的精确对应关系,运用小波包分解系数求能量公式,可求出任意频段信号的能量。
The flat damage in wheelset will generate intermittent pulse disturbance to wheel-rail during train running. When there is a contact between the flat damage of wheel and rail, the additional impact is usually a few or even dozen times more than normal value. The paper employs wavelet transform and wavelet packet to analyze honzontal wheel signal and discovers the accurate corresponding relationship between energy and each frequency band. The resolving coefficient of wavelet packet can derive the formula of energy, so that the energy of any frequency band can be calculated.
出处
《铁道运输与经济》
北大核心
2005年第8期85-87,共3页
Railway Transport and Economy
关键词
车轮
扁疤
小波变换
小波包
平轮信号
wheelset
fiat damage
wavelet transform
wavelet packet
horizontal wheel signal
