Skip to Main Content
 

Global Search Box

 
 
 
 

Files

File List


34283.pdf (111.78 MB)

ETD Abstract Container

Abstract Header

Experimental Validation of the Global Transmissibility (Direct Method) Approach to Transfer Path Analysis

Gurav, Hardik
http://rave.ohiolink.edu/etdc/view?acc_num=ucin1563273082454307

Abstract Details

2019, MS, University of Cincinnati, Engineering and Applied Science: Mechanical Engineering.
The main objective of this thesis work was to experimentally assess the validity of the global transmissibility direct transmissibility approach to transfer path analysis process of vibration transmission path identification. The use of transmissibility functions has received a renewed attention as it can help by-pass some of the rudimentary problems associated with transfer path analysis process such as measurement of operational forces or the necessity to decouple the source/ active parts of the system to measure the frequency response functions. The essence of using a transmissibility approach relies on the idea of direct transmissibilities, which can be computed from the global measurable transmissibilities. Which implies that the response at any degree of freedom to a system external force can be decomposed in terms of the remaining degree of freedom responses and the system direct transmissibilities. The experimentation was conducted on a simple in-house fabricated mechanical system with electro-mechanical shaker led excitation method. Despite its advantages over the classical transfer path analysis approach, the global transmissibility direct transmissibility method has its own hue of challenges. The most prominent on being ill-conditioning of matrices undergoing matrix inversion operations which can often result in unreliable outcomes. To mitigate this problem various regularization techniques based on improved singular value rejection has been implemented. Amongst the various regularization techniques implemented, the singular value rejection based on the FRF error threshold gives overall satisfactory results in terms of the operational response reconstruction, in trend and magnitude. The probable reasons for deviation in results, and why some regularization techniques work while others are ineffective are investigated subsequently. Based on these a course of action is suggested in an effort to trim down these deviations and develop a reliable test method that can be applied to more complex situations with confidence.
Randall Allemang, Ph.D. (Committee Chair)
Allyn Phillips, Ph.D. (Committee Member)
David Thompson, Ph.D. (Committee Member)
109 p.
Mechanical Engineering
transfer path analysis; global transmissibility; direct transmissibility; regularization; validation; blocked subsystems

Recommended Citations

Citations

  • Gurav, H. (2019). Experimental Validation of the Global Transmissibility (Direct Method) Approach to Transfer Path Analysis [Master's thesis, University of Cincinnati]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1563273082454307

    APA Style (7th edition)

  • Gurav, Hardik. Experimental Validation of the Global Transmissibility (Direct Method) Approach to Transfer Path Analysis. 2019. University of Cincinnati, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=ucin1563273082454307.

    MLA Style (8th edition)

  • Gurav, Hardik. "Experimental Validation of the Global Transmissibility (Direct Method) Approach to Transfer Path Analysis." Master's thesis, University of Cincinnati, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1563273082454307

    Chicago Manual of Style (17th edition)

ucin1563273082454307
337
© 2019, some rights reserved.Creative Commons License Experimental Validation of the Global Transmissibility (Direct Method) Approach to Transfer Path Analysis by Hardik Gurav is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported License. Based on a work at etd.ohiolink.edu.
This open access ETD is published by University of Cincinnati and OhioLINK.