Skip to Main Content
 

Global Search Box

 
 
 
 

Files

File List


Joodi_Thesis_11_26.pdf (147.8 MB)

ETD Abstract Container

Abstract Header

Comparative Assessment of Frequency Dependent Joint Properties Using Direct and Inverse Identification Methods

Joodi, Benjamin Michael
http://rave.ohiolink.edu/etdc/view?acc_num=osu1417024616

Abstract Details

2014, Master of Science, Ohio State University, Mechanical Engineering.
Elastomeric joints are utilized in many automotive applications, and exhibit frequency and excitation amplitude dependent properties. Commercial methods identify only cross-point joint property using displacement excitation at stepped single frequencies. This process is often time consuming and is limited to measuring a single dynamic stiffness term of the joint stiffness matrix. This study focuses on developing tractable laboratory inverse experiments to identify frequency dependent stiffness matrices up to 1000 Hz. Direct measurements are performed on a commercial elastomer test system and an inverse experiment consisting of an elastic beam (with a square cross section) attached to a cylindrical elastomeric joint. The experimental methods are applied to two different elastomeric materials of the same geometry. Sources of error in the inverse methodology are thoroughly examined and explained through simulation which include ill-conditioning of matrices and the sensitivity to modeling error. The identified translational dynamic stiffness and loss factor values show good agreement between the two identification methods, though challenges remain for the rotational and coupling stiffness terms.
Rajendra Singh (Advisor)
Scott Noll (Committee Member)
Brian Harper (Committee Member)
63 p.
Mechanical Engineering
Inverse identification methods; Direct identification methods; Commercial elastomer test systems; Joint stiffness properties; Dynamic stiffness; Simple lumped parameter system; System dynamics

Recommended Citations

Citations

  • Joodi, B. M. (2014). Comparative Assessment of Frequency Dependent Joint Properties Using Direct and Inverse Identification Methods [Master's thesis, Ohio State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=osu1417024616

    APA Style (7th edition)

  • Joodi, Benjamin. Comparative Assessment of Frequency Dependent Joint Properties Using Direct and Inverse Identification Methods. 2014. Ohio State University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=osu1417024616.

    MLA Style (8th edition)

  • Joodi, Benjamin. "Comparative Assessment of Frequency Dependent Joint Properties Using Direct and Inverse Identification Methods." Master's thesis, Ohio State University, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=osu1417024616

    Chicago Manual of Style (17th edition)

osu1417024616
759
© 2014, all rights reserved.
This open access ETD is published by The Ohio State University and OhioLINK.