Czasopismo
2002
|
z. 60 [197]
|
507-514
Tytuł artykułu
Autorzy
Wybrane pełne teksty z tego czasopisma
Warianty tytułu
Konferencja
Problemy Dynamiki Konstrukcji / XI Międzynarodowe Sympozjum Dynamiki Konstrukcji (XI ; 25-27. 09. 2002 ; Rzeszów-Arłamów, Polska)
Języki publikacji
Abstrakty
In the paper the problem of stability of a journal bearing system with divided and movable shell controlled by piezoelectric elements is considered. The shell consists of three segments - two fixed and the middle one driven by a piezoelectric actuator. This way the actuator affects the size of the oil gap - one of the most important parameters responsible for the stability threshold of the system. The paper presents the concept and provides one with theoretical fundamentals. Considerations are based on a simplified Reynolds equation. Nonlinear behaviour and its sensitivity to the applied method of stabilisation is examined in the direct neighbourhood of the critical threshold. A bifurcating, near-critical solution is introduced and analysed for this purpose. Results of numerical simulations prove that the method is effective and brings considerable growth of the critical speed. It is found however, that this effect is associated with increase of Floquet's exponent, which physically means that the system can exhibit subcritical bifurcation (hard self-excitation). A compromise is then required in obtaining an optimal control.
Rocznik
Tom
Strony
507-514
Opis fizyczny
Bibliogr. 8 poz., rys., wykr.
Twórcy
autor
- Politechnika Warszawska, Instytut Podstaw Budowy Maszyn, ul. Narbutta 84, 02-524 Warszawa, piotrp@ipbm.simr.pw.edu.pl
Bibliografia
Typ dokumentu
Bibliografia
Identyfikatory
Identyfikator YADDA
bwmeta1.element.baztech-article-PWA7-0016-0021