Abstract
Ignoring the effect of centrifugal force and Coriolis force can increase the vibration localization degree of bladed disk system. In order to address the problem of vibration localization of the mistuned bladed disk of an aeroengine, the finite element reduced order models of bladed disk was established by the component mode synthesis method. The mistuning of the blades were simulated using different mistuned modes. By analyzing the mistuned vibration localization characteristics, it was discussed whether to consider the effect of the centrifugal force and Coriolis force on the vibration localization characteristics on the bladed disk. The effect of the Coriolis force on the vibration localization of the mistuned bladed disk under different engine order of excitation was discussed. The results shows that the centrifugal force and Coriolis force strongly influences the vibration characteristics of both the tuned disk and mistuned bladed disk, in the analysis of the vibration localization characteristics of the mistuned bladed disk, the role of the Coriolis force cannot be ignored.
Highlights
Mistuning is a common phenomenon in aeroengine compressor bladed disk system
On the basis of the substructures modal synthesis method for the fixed interfaces, this paper considered the effect of the centrifugal force and the Coriolis force, the component mode synthesis method for the fixed interfaces was established
By analyzing the effect of the centrifugal force and Coriolis force on the vibration localization characteristics of the mistuned bladed disk, the significance of this study to engineering and conclusions as follow: 1) The calculation problem with a large number of elements and nodes can be solved by the mode synthesis method for fixed interface, this method can greatly reduce the calculation time
Summary
Mistuning is a common phenomenon in aeroengine compressor bladed disk system. Mistuning results from inconsistent blade mass, stiffness and frequency caused by the material, manufacture and wear; mistuning will lead to serious vibration localization. Wang [25] studied the randomly mistuned characteristics of the group bladed disk and analysed the relationship between the mistuned sensitivity and mistuned intensity using the lumped parameter model and Monte Carlo analysis method. On the basis of the substructures modal synthesis method for the fixed interfaces, this paper considered the effect of the centrifugal force and the Coriolis force, the component mode synthesis method for the fixed interfaces was established. Adopting this method, the finite reduced order models of the bladed disk were established.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
