The transverse vibration of the diesel engine of the No.1 generator set on a ship is severe,with a stable time domain signal of vibration speed,and the double rotational frequency component stands out prominently in the vibration velocity spectrum.This paper measured the thermal parameters of the diesel engine and the natural frequency of the diesel engine and its vibration isolation system,carried out the spectral analysis of lubricating oil and ruled out the reasons such as uneven combustion,resonance and abnormal wear.Therefore,this paper holds that the main reason for the severe vibration of the No.1 generator set is the damage of the torsional vibration damper to the diesel engine.It reduces the vibration and eliminates the fault after replacing the torsional vibration damper.
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