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Evaluation Methods for Assessing Change in Vibration Response with Variation in Engine Mounting Configuration

Mohanty, Sudeshna
http://orcid.org/0000-0002-7787-7850
http://rave.ohiolink.edu/etdc/view?acc_num=ucin1553251616841952

Abstract Details

2018, MS, University of Cincinnati, Engineering and Applied Science: Mechanical Engineering.
An engine assembly’s dynamic characteristics bear a heavy influence on the performance and structural life of engine mounted components and the engine itself. The characterization and measurement of vibration response of the assembly therefore becomes an integral part of processes such as design and development, performance evaluation and failure mode investigations. The vibration testing of an engine assembly can be performed in free-free, constrained or actual operational boundary conditions. Engine testing and response characterization often is conducted in controlled environments such as engine test cells, which approximate the boundary condition of an engine on a customer application at the engine to test cell floor or skid mounting connection. As a manufacturer of diesel engines with different test cell arrangements, Cummins was interested in developing metrics to compare between the results of the engine in different test cell mounting configurations. The motivation of this thesis was to propose metrics to assess the difference in response of the engine system between different mounting arrangements. Existing modal parameters as potential assessment metrics have been discussed. New metrics for comparison of vibration response were developed specifically for an engine assembly in a test cell environment. Representative analytical models of the engine assembly were created to model the effects of change in boundary condition, and to demonstrate the application of the assessment metric. A DOE study was performed to study the sensitivity of the response by varying the structural parameters in the analytical model, and the proposed metrics were applied to evaluate the effect of mounting arrangement for each model. Impedance modeling is shown as an optional predictive tool to forecast the change in the frequency response function characteristics due to structural modification in the mounting arrangement.
Randall Allemang, Ph.D. (Committee Chair)
Allyn Phillips, Ph.D. (Committee Member)
David Thompson, Ph.D. (Committee Member)
106 p.
Mechanical Engineering
Engine testing; Test cell mounting; Vibration isolators; Vibration response metric; Impedance modelling

Recommended Citations

Citations

  • Mohanty, S. (2018). Evaluation Methods for Assessing Change in Vibration Response with Variation in Engine Mounting Configuration [Master's thesis, University of Cincinnati]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1553251616841952

    APA Style (7th edition)

  • Mohanty, Sudeshna. Evaluation Methods for Assessing Change in Vibration Response with Variation in Engine Mounting Configuration. 2018. University of Cincinnati, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=ucin1553251616841952.

    MLA Style (8th edition)

  • Mohanty, Sudeshna. "Evaluation Methods for Assessing Change in Vibration Response with Variation in Engine Mounting Configuration." Master's thesis, University of Cincinnati, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1553251616841952

    Chicago Manual of Style (17th edition)

ucin1553251616841952
241
© 2018, some rights reserved.Creative Commons License Evaluation Methods for Assessing Change in Vibration Response with Variation in Engine Mounting Configuration by Sudeshna Mohanty is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License. Based on a work at etd.ohiolink.edu.
This open access ETD is published by University of Cincinnati and OhioLINK.