Frontiers of Mechanical Engineering
>> 2020,
Volume 15,
Issue 1
doi:
10.1007/s11465-019-0557-7
RESEARCH ARTICLE
Computation and investigation of mode characteristics in nonlinear system with tuned/mistuned contact interface
. School of Mechanical Engineering and Automation, Northeastern University, Shenyang 110819, China.. Key Laboratory of Vibration and Control of Aero-Propulsion System (Ministry of Education), Northeastern University, Shenyang 110819, China
Accepted: 2019-12-19
Available online: 2019-12-19
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Abstract
This study derived a novel computation algorithm for a mechanical system with multiple friction contact interfaces that is well-suited to the investigation of nonlinear mode characteristic of a coupling system. The procedure uses the incremental harmonic balance method to obtain the nonlinear parameters of the contact interface. Thereafter, the computed nonlinear parameters are applied to rebuild the matrices of the coupling system, which can be easily solved to calculate the nonlinear mode characteristics by standard iterative solvers. Lastly, the derived method is applied to a cycle symmetry system, which represents a shaft–disk–blade system subjected to dry friction. Moreover, this study analyzed the effects of the tuned and mistuned contact features on the nonlinear mode characteristics. Numerical results prove that the proposed method is particularly suitable for the study of nonlinear characteristics in such nonlinear systems.
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