The dynamic sif variation was found to lag behind the stress-pulse impingement by several microseconds . 人们发现,动态应力强度因子的变化滞后于应力脉冲冲击几微秒。
To pick up the micro shock pulses , a mathematical model on the technology of resonant demodulation is put forward and the pulse response of this model is derived , they provide the theoretical foundation for the application of the technology 为了提取微脉冲冲击,文中提出共振解调技术数学模型,并求解该模型的脉冲响应,为该技术的应用提供理论依据。
Engineering cases indicated : to apply the techniques of resonant demodulation can pick up micro shock pulses of hearing fault , and through analyzing the impact power fault vibration signal characteristics in the fourier chart of the resonant demodulation , the fault diagnosis will be easier 工程实例表明,使用共振解调技术可以有效提取轴承故障微小脉冲冲击,通过在共振解调傅里叶谱图上分析冲击功率故障振动信号特征,可以较容易地进行故障诊断。