Study on Repeated-Root Modes in Substructure Modal Composition Analysis

Paper #:
  • 2016-01-0477

Published:
  • 2016-04-05
DOI:
  • 10.4271/2016-01-0477
Citation:
Gao, P., Du, Y., Wang, Y., and Lv, Y., "Study on Repeated-Root Modes in Substructure Modal Composition Analysis," SAE Int. J. Passeng. Cars - Mech. Syst. 9(1):160-166, 2016, doi:10.4271/2016-01-0477.
Pages:
7
Abstract:
The dynamic properties of disc rotor play important role in the NVH performance of a disc brake system. Disc rotor in general is a centrosymmetric structure. It has many repeated-root modes within the interested frequency range and they may have significant influence on squeal occurrence. A pair of repeated-root modes is in nature one vibration mode. However, in current complex eigenvalue analysis model and relevant analysis methods, repeated-root modes are processed separately. This may lead to contradictory result. This paper presents methods to deal with repeated-root modes in substructure modal composition (SMC) analysis to avoid the contradiction. Through curve-fitting technique, the modal shape coefficients of repeated-root modes are expressed in an identical formula. This formula is used in SMC analysis to obtain an integrated SMC value to represent the total influence of two repeated-root modes. Finally the presented method is applied to analysis a high frequency squeal problem of a disc brake. SMC analysis results are given, where each pair of repeated-roots have one unique SMC. The impacts of these modes on squeal can be clearly examined.
Access
Now
SAE MOBILUS Subscriber? You may already have access.
Buy
Select
Price
List
Download
$27.00
Mail
$27.00
Members save up to 40% off list price.
Share
HTML for Linking to Page
Page URL

Related Items

Training / Education
2017-04-21
Technical Paper / Journal Article
2004-11-16
Training / Education
2011-04-12