PRESTRESSING FOR REDUCTION OF LOCAL VIBRATIONS IN A ROTORCRAFT
Grzegorz Suwała , Lech Knap , Jan Holnicki-Szulc
AbstractThe main objective of this paper is to investigate the possibility of local structural vibration suppression via introducing initial prestressing. In order to evaluate the effectiveness of the proposed method, a two-step approach has been used. Firstly, a prestressed modal analysis was conducted to measure the influence of the prestressing on changes of eigenfrequencies and eigenmodes. In the second step, a steady dynamic analysis was performed to harmonic excitation to demonstrate the reduction of local amplitudes. Numerical experiments have been conducted on the model of a small rotorcraft. Our results indicate that introduction of initial prestressing may be used to affect natural structure frequencies and to lower the amplitude of vibrations of the structure exposed to external extortions.
|Journal series||Engineering Transactions (Rozprawy inżynierskie), ISSN 0867-888X|
|Publication size in sheets||0.65|
|Keywords in Polish||Sprężenie, tłumienie drgań, ochrona konstrukcji|
|Keywords in English||prestressing; vibration suppression|
|Score|| = 15.0, 29-11-2017, ArticleFromJournal|
= 15.0, 29-11-2017, ArticleFromJournal
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