Fidelity of a Finite Element Model for Longitudinal Wave Propagation in Thick Cylindrical Wave Guides

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The ability to model wave propagation in circular cylindrical bars of finite length numerically or analytically has many applications. In this thesis the capability of an explicit finite element method to model longitudinal waves in cylindrical rods with circular cross-sections is explored. Dispersion curves for the first four modes are compared to the analytical solution to determine the accuracy of various element sizes and time steps. Values for the time step and element size are determined that retain accuracy while minimizing computational time. The modeling parameters are validated by calculating a signal propagated with a broadband input force. Limitations on ... continued below

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980 Kilobytes pages

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Puckett, A.D. September 1, 2000.

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This thesis or dissertation is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided by UNT Libraries Government Documents Department to Digital Library, a digital repository hosted by the UNT Libraries. It has been viewed 29 times . More information about this document can be viewed below.

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Description

The ability to model wave propagation in circular cylindrical bars of finite length numerically or analytically has many applications. In this thesis the capability of an explicit finite element method to model longitudinal waves in cylindrical rods with circular cross-sections is explored. Dispersion curves for the first four modes are compared to the analytical solution to determine the accuracy of various element sizes and time steps. Values for the time step and element size are determined that retain accuracy while minimizing computational time. The modeling parameters are validated by calculating a signal propagated with a broadband input force. Limitations on the applicability are considered along with modeling parameters that should be applicable to more general geometries.

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980 Kilobytes pages

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OSTI as DE00775834

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  • Other Information: TH: Thesis (M.S.); Submitted to Colorado State Univ., Department of Mechanical Engineering, Fort Collins, CO (US)

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  • Report No.: LA-13753-T
  • Grant Number: W-7405-ENG-36
  • Office of Scientific & Technical Information Report Number: 775834
  • Archival Resource Key: ark:/67531/metadc722402

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Office of Scientific & Technical Information Technical Reports

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  • September 1, 2000

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  • Sept. 29, 2015, 5:31 a.m.

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  • March 30, 2016, 12:41 p.m.

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Puckett, A.D. Fidelity of a Finite Element Model for Longitudinal Wave Propagation in Thick Cylindrical Wave Guides, thesis or dissertation, September 1, 2000; New Mexico. (digital.library.unt.edu/ark:/67531/metadc722402/: accessed May 22, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.