PRESTRESSING FOR REDUCTION OF LOCAL VIBRATIONS IN A ROTORCRAFT

Grzegorz Suwała , Lech Knap , Jan Holnicki-Szulc

Abstract

The 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.
Author Grzegorz Suwała
Grzegorz Suwała,,
-
, Lech Knap IP
Lech Knap,,
- Institute of Automotive Engineering
, Jan Holnicki-Szulc
Jan Holnicki-Szulc,,
-
Journal seriesEngineering Transactions (Rozprawy inżynierskie), ISSN 0867-888X
Issue year2016
Vol64
No3
Pages367-380
Publication size in sheets0.65
Keywords in PolishSprężenie, tłumienie drgań, ochrona konstrukcji
Keywords in Englishprestressing; vibration suppression
Languageen angielski
Score (nominal)15
ScoreMinisterial score = 15.0, 29-11-2017, ArticleFromJournal
Ministerial score (2013-2016) = 15.0, 29-11-2017, ArticleFromJournal
Citation count*0
Cite
Share Share



* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.
Back