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Parameter Evaluation and Sensitivity Analysis for an Automotive Damper Model

Thornton, Ben Johnston
http://rave.ohiolink.edu/etdc/view?acc_num=osu1354115794

Abstract Details

2012, Master of Science, Ohio State University, Mechanical Engineering.
Physical models are commonly used in the automotive industry. Accurate models exist for most automotive systems. However, few accurate models have been developed to model the individual components of automotive suspension dampers. Damper modeling is challenging due to the complexities associated with fluid flow and clearance nonlinearities, fluid-structure coupling, and overall sensitivity to parameter variations. This thesis focuses on the evaluation of gas bulk modulus, oil bulk modulus, Coulomb friction, effective mass of the body and valve resistance. The effect of these parameters on damper performance are analytically evaluated. The results show that the model is most sensitive to valve fluid resistance. Two experiments are presented. In the first experiment a simplified loading pattern was applied to the shims using steel forks. In the second experiment the displacement of the shims was measured while fluid was flowing through the valve. Although these experiments did not match exactly, valve shim stiffness calculated from each experiment led to accurate results when the model was run with these stiffness values. The overall model accuracy is adequate, though further work is needed to improve the modeling of shims and other components.
Marcelo Dapino, PhD (Advisor)
Gary Heydinger, PhD (Committee Member)
187 p.
Automotive Engineering; Mechanical Engineering
Automotive Suspension; Damper; Modeling; Bulk Modulus; Shim Stiffness; Check Valve

Recommended Citations

Citations

  • Thornton, B. J. (2012). Parameter Evaluation and Sensitivity Analysis for an Automotive Damper Model [Master's thesis, Ohio State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=osu1354115794

    APA Style (7th edition)

  • Thornton, Ben. Parameter Evaluation and Sensitivity Analysis for an Automotive Damper Model. 2012. Ohio State University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=osu1354115794.

    MLA Style (8th edition)

  • Thornton, Ben. "Parameter Evaluation and Sensitivity Analysis for an Automotive Damper Model." Master's thesis, Ohio State University, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=osu1354115794

    Chicago Manual of Style (17th edition)

osu1354115794
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© 2012, all rights reserved.
This open access ETD is published by The Ohio State University and OhioLINK.