Abstract
This paper deals with the development of a numerical model, based on the Finite Element (FE) theory for the prediction of the squeal frequency of a railway disc brake. The analytical background has been discussed and presented, as well as the most efficient methods for evaluating the system stability; the attention has been paid particularly to the complex eigenvalues method, which has been adopted within this paper to investigate the railway disc brake system. Numerical results have been compared with measurements from experimental tests in order to validate the proposed numerical approach. At the end of this work, a sensitivity analysis, aimed at understanding the effects of some physical parameters influencing the stability of the brake system and the squeal propensity, has been carried out.
Highlights
The high ecological value of rail transport is recognized by the public opinion and widely demonstrated by scientific literature
This paper deals with the development of a numerical model, based on the Finite Element (FE) theory for the prediction of the squeal frequency of a railway disc brake
At the end of this work, a sensitivity analysis, aimed at understanding the effects of some physical parameters influencing the stability of the brake system and the squeal propensity, has been carried out
Summary
The high ecological value of rail transport is recognized by the public opinion and widely demonstrated by scientific literature. High frequency brake squeal is, instead, defined as noise produced by friction induced excitation, imparted by coupled resonances (closely spaced modes) of the rotor itself as well as of other brake corner components. It is classified as squeal occurring at frequencies above 5 kHz. In general, structural and acoustic modeling methods, used to predict the performance in terms of noise and vibration, have become the key tools in the design process [19,20,21,22]. Involve only some geometrical features that allow assessing the FE model, proposed in this paper, against the experimental tests carried out by Sinou et al different strategies to reduce and/or solve the disc brake squeal noise were numerically analyzed, by approaching the problem with a sensitivity analysis
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