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一、概述 水轮发电机组的振动是由机械、电气、水力及其他等方面原因引起的。 在机械系统中振动有强迫振动和自激振动。 引起振动的干扰力来自运动的外界,维持运动干扰力的存在与运动本身无关。但振幅与干扰力成正比。当干扰力的频率与运动体的固有频率合拍时,即产生共振。此时振幅明显增大,但干扰力并不变化。即使振动停止,干扰力仍存在。这种振动称为强迫振动。例如,用手锤连续敲击主轴引起的振动即为强迫振动。
First, an overview of hydro-generator vibration is caused by mechanical, electrical, hydraulic and other causes. In mechanical systems, there are forced vibration and self-excited vibration. The disturbing forces that cause vibration come from the outside of the movement, and the existence of movement disturbing force has nothing to do with the movement itself. But the amplitude and interference force is proportional to. When the interference frequency and the natural frequency of the moving body co-beat, that is, resonance. At this point the amplitude increased significantly, but the disturbance does not change. Disturbance still exists even if vibration stops. This vibration is called forced vibration. For example, a continuous hammering of the spindle with a hand hammer is forced vibration.