69980.pdf (1.96 MB)
Frequency-domain sensitivity analysis of stability of nonlinear vibrations for high-fidelity models of jointed structures
For the analysis of essentially nonlinear vibrations it is very important not only to determine whether the considered vibration regime is stable or unstable but also which design parameters need to be changed to make the desired stability regime and how sensitive is the stability of a chosen design of a gas-turbine structure to variation of the design parameters. In the proposed paper, an efficient method is proposed for a first time for sensitivity analysis of stability for nonlinear periodic forced response vibrations using large-scale models structures with friction, gaps and other types of nonlinear contact interfaces. The method allows using large-scale finite element models for structural components together with detailed description of nonlinear interactions at contact interfaces. The highly accurate reduced models are applied in the assessment of the sensitivity of stability of periodic regimes. The stability sensitivity analysis is performed in frequency domain with the multiharmonic representation of the nonlinear forced response amplitudes. Efficiency of the developed approach is demonstrated on a set of test cases including simple models and large-scale realistic blade model with different types of nonlinearities, including: friction, gaps, and cubic elastic nonlinearity.
History
Publication status
- Published
File Version
- Accepted version
Journal
Journal of Engineering for Gas Turbines and PowerISSN
0742-4795Publisher
American Society of Mechanical EngineersExternal DOI
Event name
Proceedings of ASME Turbo Expo 2017: Turbomachinery Technical Conference and ExpositionEvent location
Charlotte, USAEvent type
conferenceEvent date
26-30 June 2017ISBN
9780791850930Department affiliated with
- Engineering and Design Publications
Research groups affiliated with
- Dynamics, Control and Vehicle Research Group Publications
Full text available
- Yes
Peer reviewed?
- Yes
Legacy Posted Date
2017-09-04First Open Access (FOA) Date
2018-08-01First Compliant Deposit (FCD) Date
2017-09-03Usage metrics
Categories
No categories selectedKeywords
Licence
Exports
RefWorks
BibTeX
Ref. manager
Endnote
DataCite
NLM
DC