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High-speed rotor dynamics
High-speed rotor dynamics
The bearing of the rotor determines the resonant characteristics of the high-speed rotor. Therefore, the bearing should be analyzed in terms of rotor-dynamics. It consists of outer-ring, inner-ring, cage, and rolling elements. In case of the bearing which exposed extremely high speed condition such as more than one million DN number. DN means product of bore diameter and rotor RPM.
We should consider high centrifugal force on the rolling elements, and slip at the rolling contact points. However, the slip on the raceway causes the skid damage and fast wear failure of bearing. We have tried to assess the possibility in slip and skid damage based on the analytical bearing dynamic model.
High-speed bearing design for skid reduction
High-speed bearing design for skid reduction
We can propose rotor-bearing clearance design method based on the dynamic model.
Considering both of slip possibility and bearing life, the contour plot can be obtained. And we can suggest proper design set based on these design criteria.
Power-train health monitoring and diagnosis
Power-train health monitoring and diagnosis
Rotor and bearing analysis based on dynamic model can be applied to engine and rotor condition monitoring of ships in the future. 27% of marine accidents on ships are caused by engine failure. Therefore, we will try to develop technologies that can detect and respond to engine failures in advance by using vibration data. Failure of mechanical components can be predicted by using convolutional neural network model with image data which I coming from vibration data. Moreover, this fault detection logic will be developed for on-board condition monitoring system that can be applied to small boats.
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