Noise and vibration phenomena in aircraft wheel and brake systems

摘要

There is a wide variety of noise and vibration phenomena in aircraft brake systems forwhich must be accounted in the design process of such systems. These phenomena includesuch modes as whirl and squeal, the latter of which can be quite different from itscounterpart in automotive systems, and has likewise received much less attention in theliterature than its automotive counterpart. Consequently, an overview of such phenomenawith representative results from simulations and experiments will be presented to highlightthe differences. Complicating matters is that brake-induced vibration often involves strongcoupling with the aircraft structure, thereby necessitating a system level understandingbeyond the brake itself. This aspect poses a particular problem to a brake componentsupplier, in how to ensure favorable noise and vibration behavior for the full aircraftsystem, particularly early in the development cycle. To accomplish this goal, Goodrich hasdeveloped a successful methodology combining simulation and testing to assess the noiseand vibration behavior at an earlier stage. The methodology implements simulations toguide appropriate brake component tests that are more tractable for the brake supplier yetsufficiently mimic the full system environment. With the combined simulation and testing,a reduction in actual testing can be achieved while improving component noise andvibration performance.