0
research-article

Investigation of the Stability of a Squeak Test Apparatus Based on an Analytical and Finite Element Models

[+] Author and Article Information
Gil Jun Lee

Department of Mechanical and Materials Engineering, College of Engineering and Applied Science, University of Cincinnati 584D Rhodes Hall, 2600 Clifton Ave., Cincinnati, OH 45221
leeg4@mail.uc.edu

Jay Kim

Department of Mechanical and Materials Engineering, College of Engineering and Applied Science, University of Cincinnati 589 Rhodes Hall, 2600 Clifton Ave., Cincinnati, OH 45221
jay.kim@uc.edu

1Corresponding author.

ASME doi:10.1115/1.4038945 History: Received June 05, 2017; Revised December 12, 2017

Abstract

Squeak is an unwanted, annoying noise generated by self-excited, friction-induced vibration. A unique squeak test apparatus that can generate squeak noises consistently was developed by modifying and employing a sprag-slip mechanism. Such an apparatus enables building database that accurately ranks squeak propensity of material pairs and will be highly useful for NVH engineers and vehicle interior designers. An analytical model of the apparatus was developed to identify instability conditions that induce unstable, large-amplitude vibration, therefore squeak noises. A finite element model was established and studied in this work to refine the design of the apparatus and better understand underlying phenomena of the squeak generation. Complex eigenvalue analysis was used to study the instability of the system and results show that the instability occurs by the coalescence of two modes which makes the effective damping of one of the coalesced modes negative. The instability condition from the complex eigenvalue analysis shows good agreement with the results obtained from the analytical model. Furthermore, dynamic transient analysis was performed to investigate the stability of the system and confirm the instability conditions identified from the complex eigenvalue analysis. The effects of main design parameters on the stability were investigated by dynamic transient analysis. The results obtained from the actual tests shows that the test apparatus consistently generates unstable vibration of a very large amplitude, indicating generation of squeak noises.

Copyright (c) 2017 by ASME
Your Session has timed out. Please sign back in to continue.

References

Figures

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In