ELFT HÍRADÓ

[Gyorgy Karolyi <karolyi AT tas.me.bme.hu>]

MEGHIVO



a BME Tartoszerkezetek Mechanikaja Tanszek es a
BME Muszaki Mechanikai Tanszek altal kozosen szervezett
Mechanika szeminarium
kovetkezo eloadasara

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Jorg Wauer
(Univeristat Karlsruhe, Inst. fur Technische Mechanik)

Friction-induced instabilities in a disk brake model


2003. szeptember 30. kedd, 10.30 ora 



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Az eloadas helye:


BME Muszaki Mechanikai Tanszek
MM epulet, konyvtar

A szeminarium honlapja:
http://www.me.bme.hu/esemeny/szilszem/index.html

Minden erdeklodot szivesen latunk.


Kivonat:

The dynamics of a structural car brake model is examined to explain brake
noise by friction-induced instabilities including thermal effects. The
rotating brake disk is modeled as a ring with two pads considered as rigid
bodies which are in a one--point contact with the ring. Each pad is
viscoelastically suspended in axial and circumferential direction and
loaded with a constant brake load. At the contact points, heat is fed into
the thermoelastic ring which is proportional to the power of the two
friction forces. After discretizing the governing boundary value problem
by a modal expansion technique, a highly nonlinear system of ordinary
differential equations is obtained. It forms the starting point of the
stability analysis showing instabilities for higher and for low driving
speed responsible for brake noise. Several suggestions are made to obtain
stable operation conditions without noise.