This paper research the vibration motivation and vibration signal effect with different inspirit factor,and analyze concoct effect because of concussion which is caused by fault of bearing and gear.

• 本文首先对齿轮和轴承的振动机理以及各种激励因素对振动信号的影响进行了详细研究，并分析了由于齿轮、轴承故障的存在所引起的冲击对振动信号产生的调制作用。