ESTIMATION OF WEAR IN DRY FRICTION DAMPERS AND ITS EFFECT ON VIBRATION REDUCTION

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Thesis_Aykut_Cardak.pdf

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2022-8-31

Author

Çardak, Aykut

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Although friction is mostly considered an undesirable phenomenon due to its energy dissipation characteristic, specially designed dry friction dampers utilize this feature to reduce the dynamic response of the system at the resonant frequencies. However, fretting wear due to dry friction during the operational life of the structure may drastically shift the performance from the initial design point and eventually cause drastic failures. Hence, it is important to establish a sophisticated algorithm that couples nonlinear dynamic response solver of frictionally constraint problems with a fretting wear model. In this thesis, the proposed methodology is utilized to find the evolution of dynamic response and surface topography of two widely used case studies which are shrouded blade and grounded blade platforms under ongoing vibration cycles.

Subject Keywords

Nonlinear Vibration, Harmonic Balance Method, Dry Friction Damping, Fretting Wear

URI

https://hdl.handle.net/11511/99671

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Graduate School of Natural and Applied Sciences, Thesis

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Citation Formats

A. Çardak, “ESTIMATION OF WEAR IN DRY FRICTION DAMPERS AND ITS EFFECT ON VIBRATION REDUCTION,” M.S. - Master of Science, Middle East Technical University, 2022.