Analysis of Instabilities and Power Flow in Brake Systems with Coupled Rotor Modes 2001-01-1602
Recent investigations by others have indicated that the dynamic response of automotive brake rotors in the squeal frequency range involves the classic flexural modes as well as in-plane motion. While the latter set creates primarily in-plane displacements, there is coupling to transverse displacements that might produce vibrational instabilities. This question is investigated here by analyzing a modal model that includes two modes of the rotor and two modes of the pad and caliper assembly. Coupling between in-plane and transverse displacements is explicitly controlled. Results from this model indicate that the coupling does create vibrational instabilities. The instabilities, whose frequencies are in the squeal range, are characterized by power flow through the transverse motion of the rotor.
Citation: McDaniel, J., Li, X., Moore, J., and Chen, S., "Analysis of Instabilities and Power Flow in Brake Systems with Coupled Rotor Modes," SAE Technical Paper 2001-01-1602, 2001, https://doi.org/10.4271/2001-01-1602. Download Citation
Author(s):
J. Gregory McDaniel, Xianhui Li, James Moore, Shih-Emn Chen
Affiliated:
Boston Univ., Noise and Vibration Consultant, Ford Motor Co.