Skip to Main Content
 

Global Search Box

 
 
 
 

Files

File List


Vinay Ravi_Master's_Thesis_SU18_MAE.pdf (3.8 MB)

ETD Abstract Container

Abstract Header

Effect of nonlinear chamber compliance and pumping areas on the dynamic stiffness and chamber pressure of a hydraulic body mount

Ravi, Vinay
http://rave.ohiolink.edu/etdc/view?acc_num=osu1532032639331273

Abstract Details

2018, Master of Science, Ohio State University, Mechanical Engineering.
The application of hydraulic body mounts between a pickup truck frame and cabin have been shown to reduce freeway hop and smooth road shake; yet, this process is typically performed through iterative prototype evaluations on vehicles. Prior studies developing physics-based reduced-order models have demonstrated the preload and amplitude dependence of these components; however, the nature of the component's geometric nonlinearities has not been examined. Here, physical insight is provided through the development and analysis of three illustrative hydraulic mounts configurations. The chamber compliance and effective pumping areas are shown to be constant, preload dependent, or chamber pressure-differential dependent depending upon the placement and shape of the internal elastomeric springs. This thesis develops methodologies to extract the parameters for the reduced-order model parameters from a detailed dynamic nonlinear finite element hydraulic mount model. The fluid-structure interaction is captured using fluid cavity and exchange definitions within the finite element model. Comparisons are made between the dynamic nonlinear finite element and reduced-order models for purposes of model verification. Finally, the analysis methods are applied to a production hydraulic body mount. It is demonstrated that the middle spring undergoes a snap-through like, geometric nonlinearity that influences the effective pumping area and pressure differential dependence on chamber compliance.
Scott Noll (Advisor)
Shawn Midlam-Mohler (Committee Member)
87 p.
Automotive Engineering; Mechanical Engineering
Hydraulic body mount, NVH, System Dynamics, Nonlinear Analysis, FEA

Recommended Citations

Citations

  • Ravi, V. (2018). Effect of nonlinear chamber compliance and pumping areas on the dynamic stiffness and chamber pressure of a hydraulic body mount [Master's thesis, Ohio State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=osu1532032639331273

    APA Style (7th edition)

  • Ravi, Vinay. Effect of nonlinear chamber compliance and pumping areas on the dynamic stiffness and chamber pressure of a hydraulic body mount. 2018. Ohio State University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=osu1532032639331273.

    MLA Style (8th edition)

  • Ravi, Vinay. "Effect of nonlinear chamber compliance and pumping areas on the dynamic stiffness and chamber pressure of a hydraulic body mount." Master's thesis, Ohio State University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=osu1532032639331273

    Chicago Manual of Style (17th edition)

osu1532032639331273
214
© 2018, all rights reserved.
This open access ETD is published by The Ohio State University and OhioLINK.
Release 3.2.12