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Arun Ramanathan MS Thesis 2017.pdf (5.05 MB)

ETD Abstract Container

Abstract Header

Dynamic response of a shipping container rack and suspended automotive parts under random excitation: Experimental, Computational and Analytical Studies

Ramanathan, Arun Kumar Kumar
http://rave.ohiolink.edu/etdc/view?acc_num=osu1492093294208549

Abstract Details

2017, Master of Science, Ohio State University, Mechanical Engineering.
Shipping containers are exposed to complex dynamic loading conditions during transport via truck, rail, and air. The loading conditions are further complicated by contact gap nonlinearities between the cart and ground, cart holders and suspended parts, and between neighboring suspended parts. This study focuses on developing a modeling strategy to simulate a container cart with parts undergoing random vibration tests based on standard road profiles. Initially, the linear system response to a random excitation profile of the cart structure is examined in frequency domain and correlated with experimental measurements. The linear system predictions lacked the required modeling fidelity to capture the nonlinear dynamic behavior observed during the testing as the container is loaded. Thus, the nonlinear response is then simulated in time domain using the explicit integration method with contact-driven boundary conditions using a commercially available finite element software. The total run time is determined to be prohibitively long for the time domain formulation, say over 5 seconds with a time step size of 0.3 microsec. Finally, a dynamic substructuring strategy is employed and implemented using super elements in the commercial finite element code. This particular method captured the dynamic amplification of the cart, maintained the contact nonlinearities, and reduced the computational burden. Further, a minimal order lumped model of the dynamic system is developed to understand the physics of the problem. Both lumped and finite element models consistently captured the nonlinear random vibration phenomenon and predicted the overall acceleration levels within 20% of measurements.
Rajendra Singh (Advisor)
Jason Dreyer (Committee Member)
Scott Noll (Committee Member)
73 p.
Engineering; Mechanical Engineering; Packaging
packaging, transport vibrations, dynamic substructuring, finite element analysis FEA, nonlinear lumped models, numerical modeling, random vibration tests

Recommended Citations

Citations

  • Ramanathan, A. K. K. (2017). Dynamic response of a shipping container rack and suspended automotive parts under random excitation: Experimental, Computational and Analytical Studies [Master's thesis, Ohio State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=osu1492093294208549

    APA Style (7th edition)

  • Ramanathan, Arun Kumar. Dynamic response of a shipping container rack and suspended automotive parts under random excitation: Experimental, Computational and Analytical Studies. 2017. Ohio State University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=osu1492093294208549.

    MLA Style (8th edition)

  • Ramanathan, Arun Kumar. "Dynamic response of a shipping container rack and suspended automotive parts under random excitation: Experimental, Computational and Analytical Studies." Master's thesis, Ohio State University, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=osu1492093294208549

    Chicago Manual of Style (17th edition)

osu1492093294208549
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© 2017, all rights reserved.
This open access ETD is published by The Ohio State University and OhioLINK.