Modal sound radiation of a brake rotor is expressed in terms of analytical solutions of a generic thick annular disk having similar geometric dimensions. Finite element method is used to determine structural modes and response. Vibro-acoustic responses such as surface velocities and radiated sound pressures due to a multi-modal excitation are calculated from synthesized structural modes and modal acoustic radiation of the rotor using the modal expansion technique. In addition, acoustic power and radiation efficiency spectra corresponding to a specific force excitation are obtained from the sound pressure data. Accuracy of the new semi-analytical method has been confirmed by purely numerical analyses based on finite element and boundary element models. Our method should lead to an improved understanding of the sound radiation from a brake rotor and strategies to minimize squeal noise radiation could be formulated.
Sound Radiation from a Disk Brake Rotor Using a Semi-Analytical Method
Sae Technical Papers
SAE 2003 Noise & Vibration Conference and Exhibition ; 2003
05.05.2003
Aufsatz (Konferenz)
Englisch
Sound radiation from a disk brake rotor using a semi-analytical method
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