[en] To limit the risk of high cycle fatigue, underplatform dampers (UDPs) are traditionally used in aircraft engines to control the level of vibration. Many studies demonstrate the impact of the geometry of the damper on its efficiency, thus the consideration of topological optimization (TO) to find the best layout of the damper seems natural. Because of the nonlinear behavior of the structure due to the friction contact interface, classical methods of TO are not usable. This study proposes to optimize the layout of an UDP to reduce the level of nonlinear vibrations computed with the multiharmonic balance method (MHBM). The approach of TO employed is based on the moving morphable components (MMC) framework together with the Kriging and the efficient global optimization algorithm to solve the optimization problem. The results show that the level of vibration of the structure can be reduced to 30% and allow for the identification of different efficient geometries.
Disciplines :
Aerospace & aeronautics engineering
Author, co-author :
Denimal, E
El Haddad, F
Wong, C
Salles, Loïc ; Université de Liège - ULiège > Aérospatiale et Mécanique (A&M) ; Imperial College London > Mechanicla Engineering > Vibration University Technology Centre
Language :
English
Title :
Topological optimization of under-platform dampers with moving morphable components and global optimization algorithm for nonlinear frequency response
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