摩擦噪声动态谱图分析及应用

Analysis and Application of Dynamic Spectrum of Friction-Induced Noise

采用动态谱图分析摩擦噪声特性.结果表明,动态谱图能充分反映摩擦噪声的时变性、频谱结构和动态范围.实验证明,动态谱图对设备运行状态、转速等参数的变化十分敏感,因此可将动态谱图用于设备运行状态监测和故障诊断.提出采用谱图灰度均值作为故障敏感因子,并介绍了具体量化方法.

Dynamic spectrum was applied to analysis of friction-induced noises. The result indicates that a dynamic spectrum contains rich information about time-variation, frequency spectrum structure and dynamic range of friction-induced noises. Experiments prove that dynamic spectrum is very sensitive to the change of operating parameters of equipment and can be applied to monitoring and fault diagnosis for equipment under operation. The average gray-scale of dynamic spectrum was selected as a fault sensitivity factor, and their quantification procedures were introduced.