而在柴油机的故障中，曲轴轴瓦的损坏占有很大的比例。
Of all the troubles that diesel engine meets, the most common trouble is bearing insert damage.
内燃机曲轴轴承所受到的冲击信号是非平稳、时变信号，用传统的诊断方法难以进行故障的早期发现和诊断。
Vibration signals borne by different main bearing clearances are not stationary and time variant. It is difficult to early detect and diagnose by means of traditional methods.
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