La Houille Blanche
Number 3-4, Juin 1998
|Page(s)||99 - 104|
|Published online||01 August 2009|
Comportement dynamique linéaire et non linéaire des paliers et des joints
Linear and non linear dynamic behaviour of bearings and seals
Laboratoire de Mécanique des Solides, UMR 6010 CNRS, Université de Poitiers
High speed rotors set a lot of stability problems especially when the speed of rotation is going throuhg a critical speed. The dynamical behavior of the fluid bearings has, in that case, an important effect. This study presents several models of dynamical behavior og bearing taking into account the flexibility of the shaft. The squeeze film damper (SFD) behavior is also discribed. This element gives a lot of damping but its behavior is totally non linear.
An approash of active squeeze film damper is presented: a variable clearance SFD or a variable viscosity SFD (fed with electro-rheological fluid) is used to control a flexible shaft.
© Société Hydrotechnique de France, 1998