Title: Description of constraint force and prediction of vibration responses for dry friction damped blade
Abstract: A numerical 3D friction contact model is developed to depict the constraint force occurring on the contact surfaces of the damped blade in complex motions,which could be used to investigate the nonlinear vibration responses of the damped blade.By discretizing the contact surfaces into several contact pairs and obtaining the distributed constraint forces,the model could depict the stick-sliping state and nonuniform distribution of the normal contact force.The difference between the static friction coefficient and dynamic friction one and the anisotropy of the contact surfaces are taken into account in the model.The numerical 3D friction contact model high order harmonic balance method are combined to investigate the nonlinear vibration responses of a real turbine blade with shrouded dampers under the complex excitations.The results show that the blade vibration responses have several local maxima in one motion period,displaying multiple harmonical characteristics.
Publication Year: 2012
Publication Date: 2012-01-01
Language: en
Type: article
Access and Citation
AI Researcher Chatbot
Get quick answers to your questions about the article from our AI researcher chatbot