Publisher DOI: 10.4271/15-16-01-0004
Title: A Novel Approach for the Frequency Shift of a Single Component Eigenmode through Mass Addition in the Context of Brake Squeal Reduction
Language: English
Authors: Deutzer, Marcel 
Stender, Merten 
Tüpker, Nicolas 
Hoffmann, Norbert  
Keywords: Frequency shift; Partial eigenvalue assignment; Passive control; Sizing optimization
Issue Date: 23-Sep-2022
Source: SAE International Journal of Passenger Vehicle Systems 16 (1): (2022-09-23)
Abstract (english): 
Brake squeal reduces comfort for the vehicle occupants, damages the reputation of the respective manufacturer, and can lead to financial losses due to cost-intensive repair measures. Mode coupling is mainly held responsible for brake squeal today. Two adjacent eigenfrequencies converge and coalesce due to a changing bifurcation parameter. Several approaches have been developed to suppress brake squeal through structural changes. The main objective is to increase the distance of coupling eigenfrequencies. This work proposes a novel approach to structural modifications and sizing optimization aiming for a start at shifting a single component eigenfrequency. Locations suitable for structural changes are derived such that surrounding modes do not significantly change under the modifications. The positions of modifications are determined through a novel sensitivity calculation of the eigenmode to be shifted in frequency. In the present work, the structural changes are carried out on a beam and a brake caliper. Selected eigenfrequencies are shifted while the frequencies of the other eigenmodes are simultaneously fixed. Experimental investigations for the brake caliper validate the numerical findings and the applicability as well as efficiency of the proposed methods.
ISSN: 2770-3460
Journal: SAE International Journal of Passenger Vehicle Systems 
Institute: Strukturdynamik M-14 
Document Type: Article
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