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Assessment of Alternate Viscoelastic Contact Models for a Bearing Interface between an Axial Piston Pump Swash Plate and Housing

Miller, Adam Charles

Abstract Details

2014, Master of Science, Ohio State University, Mechanical Engineering.
Variable displacement axial piston pumps are commonly found on a wide variety of off-highway vehicles and industrial equipment. Typically, these pumps employ a swash plate supported by a hydrostatic bearing to control the pump's volumetric displacement. Previous vibro-acoustical studies have identified the bearing interface between the swash plate and pump housing as a potential source of error in predicting vibration and structure-borne noise. A better understanding of the physics of this interface is necessary to improve pump noise prediction. Therefore, several experiments are first designed to measure the interfacial properties under static (force vs. deflection), modal (motion transmissibility), and transient (step-like) conditions. The results of the three experiments are then used to develop tractable linear viscoelastic models, with minimal parameters. Parallel force transmission paths (structural and fluid) are required to adequately describe the observed transmitted forces in time domain. The interfacial stiffness and damping properties of the main models are quantified with varying mean loads in the presence or absence of oil. Of the models examined, a combination of Kelvin-Voigt and Maxwell formulations yields a better fit for vibration (modal) and transient (step-like) experiments, especially in the presence of oil within the interface. Nevertheless, the linear visoelastic model parameters are effected by nonlinearities as their values depend on mean load, lubrication condition, and amplitude of excitation.
Rajendra Singh (Advisor)
Mei Zhuang (Committee Member)
Jason Dreyer (Committee Member)
46 p.

Recommended Citations

Citations

  • Miller, A. C. (2014). Assessment of Alternate Viscoelastic Contact Models for a Bearing Interface between an Axial Piston Pump Swash Plate and Housing [Master's thesis, Ohio State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=osu1403274866

    APA Style (7th edition)

  • Miller, Adam. Assessment of Alternate Viscoelastic Contact Models for a Bearing Interface between an Axial Piston Pump Swash Plate and Housing. 2014. Ohio State University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=osu1403274866.

    MLA Style (8th edition)

  • Miller, Adam. "Assessment of Alternate Viscoelastic Contact Models for a Bearing Interface between an Axial Piston Pump Swash Plate and Housing." Master's thesis, Ohio State University, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=osu1403274866

    Chicago Manual of Style (17th edition)