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A sensitivity-based method for direct stochastic analysis of nonlinear forced response for bladed disks with friction interfaces
An efficient method is developed to calculate stochastic and uncertainty characteristics of forced response for nonlinear vibrations of bladed disks with friction and gap contact interfaces. Uncertainty ranges, statistical characteristics, and probability density functions for forced response levels are determined directly without any sampling procedure. The method uses approximations of the forced response level based on derived analytically and calculated extremely fast and accurately sensitivity coefficients of forced response with respect to friction contact interface parameters. The method effectiveness allows analysis of strongly nonlinear vibration of bladed disks using realistic large-scale finite element models. The method is implemented in a program code developed at Imperial College and numerical examples of application of the method for stochastic analysis of a realistic blisc with underplatform dampers are provided
History
Publication status
- Published
Journal
Journal of Engineering for Gas Turbines and PowerISSN
0742-4795Publisher
American Society of Mechanical EngineersExternal DOI
Issue
2Volume
130Page range
022503Department affiliated with
- Engineering and Design Publications
Full text available
- No
Peer reviewed?
- Yes
Legacy Posted Date
2012-11-26Usage metrics
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