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Using Group Transmissibility Concepts to Compare Dissimilar Vehicle Platforms

Yee, Abigail K.
http://rave.ohiolink.edu/etdc/view?acc_num=ucin1250525222

Abstract Details

2009, MS, University of Cincinnati, Engineering : Mechanical Engineering.
In today’s market, the average car manufacturer is trying to improve not only their car’s functionality, but also its ride comfort. One way to do this is to refine the structural system of the vehicle from a vibration or acoustic standpoint. However, there is currently no simple way to compare different vehicles. This thesis addresses one method to do just that. This method uses transmissibility as an indicator between the vehicles, where transmissibility is an output acceleration divided by a reference displacement, instead of the typical frequency response function. In particular, group transmissibility, or an averaged transmissibility is used. This is an average of several response points obtained from a particular sub-structure common to all of the vehicles tested, with a focus on the cross body beam and the A-pillar. Four different vehicles were tested, one of which was the Best in Class vehicle which was used as a target baseline. This was part of a larger project to determine if squeak and rattles could be detected based on the structure of the vehicle. Three different group transmissibilites were calculated, one first averaged over the reference points, another averaged over the response or output points and the last averaged over both the reference and response points, with the latter two more extensively evaluated than the first. In the end, the Best in Class vehicle did have different group transmissibility characteristics for some frequency ranges compared to the other vehicles, although it did not indicate that it was radically different from the other vehicles tested. Perhaps with more testing a stronger baseline can be established and a simpler method for comparing vehicles ascertained.
Randall J. Allemang, PhD (Committee Chair)
Teik C. Lim, PhD (Committee Member)
Allyn W. Phillips, PhD (Committee Member)
Mechanical Engineering
group transmissibility; transmissibility

Recommended Citations

Citations

  • Yee, A. K. (2009). Using Group Transmissibility Concepts to Compare Dissimilar Vehicle Platforms [Master's thesis, University of Cincinnati]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1250525222

    APA Style (7th edition)

  • Yee, Abigail. Using Group Transmissibility Concepts to Compare Dissimilar Vehicle Platforms. 2009. University of Cincinnati, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=ucin1250525222.

    MLA Style (8th edition)

  • Yee, Abigail. "Using Group Transmissibility Concepts to Compare Dissimilar Vehicle Platforms." Master's thesis, University of Cincinnati, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1250525222

    Chicago Manual of Style (17th edition)

ucin1250525222
519
© 2009, some rights reserved.Creative Commons License Using Group Transmissibility Concepts to Compare Dissimilar Vehicle Platforms by Abigail K. Yee is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported License. Based on a work at etd.ohiolink.edu.
This open access ETD is published by University of Cincinnati and OhioLINK.