Excellent Brake Noise Comfort by Simulation – Advanced Methods to Create Stability Maps English Free

Numerical methods for brake squeal analysis are widely accepted in industry. The approach to use complex eigenvalue analysis is successful to forecast the appearance of squeal noise. Using simulations in an early design stage helps to reduce time to market, to save costs and to improve the physical behaviour and robustness of the system. This paper will show advanced methods that use a specific strategy to reduce computation time. The industrial example of a PORSCHE brake system is analysed by this simulation strategy. The process starts with the validation of the disc by comparison of mode shapes from test rig with FEM results and subsequent geometrical optimization. The next step is model updating of the transversely isotropic material of the pad. All remaining parameters, like brake pressure, rotational speed of the wheel, friction coefficient between disc and pad, and Young’s modulus of disc are samples in one single PERMAS run. The resulting stability map expands the knowledge about the NVH behaviour and robustness of the brake system for a wide range of parameter combinations. The additional information from the stability map strongly supports the development of a robustly quiet brake system.

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