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ucin1277155789.pdf (5.34 MB)
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Abstract Header
Operational Modal Analysis Studies on an Automotive Structure
Author Info
Swaminathan, Balakumar
Permalink:
http://rave.ohiolink.edu/etdc/view?acc_num=ucin1277155789
Abstract Details
Year and Degree
2010, MS, University of Cincinnati, Engineering : Mechanical Engineering.
Abstract
Conventional Experimental Modal Analysis (EMA) methods have utilized Frequency Response Functions (FRFs) obtained by measuring both output measurements and input forces in a system. In recent years, there has been development of output-only Operational Modal Analysis (OMA) methods that do not require the measurement of input forces under strict assumptions in terms of the nature of excitation forces. These techniques find extensive applications in study of bridges and other structures where the assumptions are satisfied, and where it is difficult to measure input forces. The aim of this thesis work is to explore the use of this methodology for automotive applications. It is important to note that the OMA assumptions might not be necessarily met in this study, and this becomes part of the objective. The real operational condition of a vehicle is at most times very different from its static one. While EMA techniques have been successfully employed on automotive structures to study their modal behavior, it is to be noted that these are not real operating conditions for the automobile. Doing a test on a vehicle in real excitation conditions such as running on a test track also poses several logistical challenges in terms of instrumentation and data acquisition. This thesis work attempts to study automotive structures using output measurements alone, while exciting the structure using means which are closer to real conditions. Results from these tests are compared with well established experimental methods using standard validation tools.
Committee
Randall Allemang, PhD (Committee Chair)
David Brown, PhD (Committee Member)
Allyn Phillips, PhD (Committee Member)
Pages
68 p.
Subject Headings
Mechanical Engineering
Keywords
Operational Modal Analysis
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Citations
Swaminathan, B. (2010).
Operational Modal Analysis Studies on an Automotive Structure
[Master's thesis, University of Cincinnati]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1277155789
APA Style (7th edition)
Swaminathan, Balakumar.
Operational Modal Analysis Studies on an Automotive Structure.
2010. University of Cincinnati, Master's thesis.
OhioLINK Electronic Theses and Dissertations Center
, http://rave.ohiolink.edu/etdc/view?acc_num=ucin1277155789.
MLA Style (8th edition)
Swaminathan, Balakumar. "Operational Modal Analysis Studies on an Automotive Structure." Master's thesis, University of Cincinnati, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1277155789
Chicago Manual of Style (17th edition)
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Document number:
ucin1277155789
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804
Copyright Info
© 2010, all rights reserved.
This open access ETD is published by University of Cincinnati and OhioLINK.