Avoidance of brake squeal by a separation of the brake ... - tuprints

4.4 Introductory example of a bicycle brake disc optimization
from the rounding process. This leads to the conclusion that both solutions
can be treated as robust against manufacturing uncertainties and are therefore,
from this point of view, highly suitable for the application in passenger
cars.
Of course, the resistance against brake squeal is only one aspect when considering
brake discs for series applications. Others, even more important ones
are e.g. temperature endurance, fatigue and wear resistance or manufacturing
costs. These aspects have not been considered here and would surely lead to
changes in the designs when considered properly. It was, however, not the
goal of this work to develop realistic brake discs directly applicable for series
production. Still, the optimized designs would be suitable for the generation
of prototypes for squeal tests similar to the tests performed with the disc
with radial holes. Since the generation of such cast prototypes is elaborate
and cost-intensive, no prototypes were generated. It is more convenient and
similarly significant to test bicycle brake discs and therefore, these have been
optimized as well. This optimization and the results will be presented in the
next sections.
4.4 Introductory example of a bicycle brake
disc optimization
In order to give a first insight into the optimization of bicycle brake discs and
to highlight similarities and differences to the automotive case, a first example
of the optimization of a bicycle brake disc is shown. It was first published
in [126]. The angular position ϕ n and radial position r n of the holes in the
friction ring is varied here, as is presented in Fig. 3.11, b). The optimization
problem to split the eigenfrequencies of the brake disc under variation of N
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