关键词: 铁道罐车, 纵向冲击, 数字滤波, 功率谱密度

Abstract: Considering railroad tank cars and tank mounted object as a complex system, it is quite complex to study the problem of vehicle safety, especially the tanker problems caused by longitudinal acceleration under the interaction between wheel and rail tracks at run time. In order to analyze the causes of the problems and the characteristics of longitudinal acceleration when problems occurred, cross-spectral density function can be obtained by normal signal and longitudinal acceleration signal to find the total longitudinal impact frequency. Otherwise, the frequency is filtered out of the signal which contains faults, and repeated several times, the main components of the fault signal in the normal operation can be weaken. Finally, the longitudinal fault impact frequency can be extracted from the fault signal by the acceleration power spectral density.

Key words: railway tank car, longitudinal impact, digital filtering, power spectral density