Influence of the Gyroscopic Effects on Friction Induced Vibration in Aircraft Braking in System Messier-Bugatti-Dowty

Format:

Conference/Event

Author/Creator:

Hurel, Hurel, author.

Contributor:

Besset, Sébastien

Diebold lng, Jean-Frédéric

Jezequel, Louis

Conference Name:

SAE 2012 Brake Colloquium & Exhibition - 30th Annual (2012-09-23 : San Diego, California, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2012

Summary:

Aeronautical brakes are subject to non-linear unstablevibrations. In particular, two modes appear and present a risk forthe structure. Firstly, the whirl modes consist of a rotatingbending motion of the axle out-of-phase with the brake torque tube.It is due to a coupling of two bending modes of the axle inorthogonal directions. Secondly, the brake squeal mode resultingfrom stick-slip or sprag-slip phenomena consists of a rotationalmotion of the brake around the axle. Those vibrations are notresulting from an external excitation but are friction-inducedself-excited. Hence, they are dependent on tribological phenomenaspecific to carbon disks and are in particular controlled by thefriction coefficient μ.In order to take into account the dynamical aspect in brakedesign, Messier-Bugatti-Dowty wants to simulate modes andacceleration g's levels. This article deals with theimprovement of such a model.A finite element of the brake exists. It is able to reproducewhirl modes and squeal mode. In order to improve it, physicalphenomena must be introduced. Here, the impact of gyroscopiceffects is evaluated. For this, an analytical model is built todetermine the consequences on frequencies and stability

Notes:

Vendor supplied data

Publisher Number:

2012-01-1804

Access Restriction:

Restricted for use by site license