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Unamboowe Thesis OhioLINK.pdf (6.73 MB)

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Transient Dynamics of Curved Beams under Thermal Loading

Unamboowe, Heshan Bandara
http://orcid.org/0000-0002-5169-8213
http://rave.ohiolink.edu/etdc/view?acc_num=miami1532706228060436

Abstract Details

2018, Master of Science, Miami University, Mechanical and Manufacturing Engineering.
Curved beams are an essential structural form widely used in the engineering industry. When loaded past a critical point, they may buckle in a bifurcation or snap-through mode. Studies have shown that structural buckling problems are highly sensitive to slight changes in thermal properties. A shallow curved beam model subjected to a harmonic excitation was considered in this paper. A simplified, dimensionless one degree of freedom numerical model was obtained following the works of [1]. Using this model, transient dynamics of the system were evaluated for varying forcing parameters. The effect of the arch rise (λ) was examined as varying thermal properties affect the geometry of the beam system. A shallow arch experiment was introduced to validate the numerical model obtained. Arch rise due to thermal loading was recorded in the experiment and a function for λ due to change in temperature and time was developed to be incorporated in the numerical model. Receptance transfer functions of both experimental and numerical models verified that the numerical model is a valid approximation. Wavelet analysis was utilized to analyze time series data in the frequency domain and to produce an effective representation of system responses localized in both time and frequency.
Amit Shukla, PhD. (Committee Member)
Edgar Caraballo, PhD. (Committee Member)
James Chagdes, PhD. (Committee Member)
83 p.
Mechanical Engineering
Curved beams; transient dynamics; thermal loading; nonlinear dynamics; arch rise

Recommended Citations

Citations

  • Unamboowe, H. B. (2018). Transient Dynamics of Curved Beams under Thermal Loading [Master's thesis, Miami University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=miami1532706228060436

    APA Style (7th edition)

  • Unamboowe, Heshan. Transient Dynamics of Curved Beams under Thermal Loading. 2018. Miami University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=miami1532706228060436.

    MLA Style (8th edition)

  • Unamboowe, Heshan. "Transient Dynamics of Curved Beams under Thermal Loading." Master's thesis, Miami University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=miami1532706228060436

    Chicago Manual of Style (17th edition)

miami1532706228060436
742
© 2018, all rights reserved.
This open access ETD is published by Miami University and OhioLINK.