Vibration modes of spherical shells and containment vessels.

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Spherical pressure vessels are used to fully contain the effects of high explosions. In this paper, the vibrations of a spherical containment vessel undergoing elastic response are investigated. Vibration modes of containment vessels are of particular interest, as it is the superposition and interaction of different modes of response with closely spaced frequencies that has been reported to be the mechanism of 'strain growth'. First, the modal frequencies of a spherical shell for both axisymmetric and nonaxisymmetric response modes are discussed, based on a sequence of papers that have appeared in the open literature. Analytical predictions are then compared with ... continued below

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13 p.

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Duffey, T. A. (Thomas A.) & Romero, C. D. (Christopher D.) January 1, 2001.

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Description

Spherical pressure vessels are used to fully contain the effects of high explosions. In this paper, the vibrations of a spherical containment vessel undergoing elastic response are investigated. Vibration modes of containment vessels are of particular interest, as it is the superposition and interaction of different modes of response with closely spaced frequencies that has been reported to be the mechanism of 'strain growth'. First, the modal frequencies of a spherical shell for both axisymmetric and nonaxisymmetric response modes are discussed, based on a sequence of papers that have appeared in the open literature. Analytical predictions are then compared with numerical simulations using ABAQUS. It is found that the numerical simulations accurately predict both the axisymmetric and nonaxisymmetric modal frequencies for the complete spherical shell. Next, numerical simulations of modal frequencies for the more complex spherical containment vessel (with nozzles) are compared with the spherical shell results. Numerical simulations for the spherical containment vessel reveal that frequencies are somewhat similar to the complete spherical shell. Limited comparisons with experimentally recorded frequencies for participating modes of vessel dynamic response during high explosive containment testing are presented as well.

Physical Description

13 p.

Source

  • Submitted to: 2002 ASME Pressure Vessels and Piping Conference, American Society of Mechanical Engineers, Vancouver, BC, Canada, August 4-8, 2002

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  • Report No.: LA-UR-01-5998
  • Grant Number: none
  • Office of Scientific & Technical Information Report Number: 975844
  • Archival Resource Key: ark:/67531/metadc933775

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • January 1, 2001

Added to The UNT Digital Library

  • Nov. 13, 2016, 7:26 p.m.

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  • Dec. 12, 2016, 5:23 p.m.

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Duffey, T. A. (Thomas A.) & Romero, C. D. (Christopher D.). Vibration modes of spherical shells and containment vessels., article, January 1, 2001; United States. (digital.library.unt.edu/ark:/67531/metadc933775/: accessed December 16, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.