Three dimensional experimental modal analysis on a water filled cylindrical shell

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Results from an experimental modal analysis on a waterfilled cylindrical shell are compared with a corresponding analytic model solution. The resulting modal parameters are used to determine directional forces from turbulent boundary layer pipe flow excitation. The thin-walled, 24-inch long, aluminum shell has clamped end conditions imposed within a section of a continuous pipe. Mode shapes, damping, in vacuo and water-filled resonance frequencies, and modal masses are evaluated. The three dimensional shell response to all three coordinate excitations is examined and compared. Directional coupling exists for all shell modes except the lowest order (n=0: "breathing") modes. These modes represent a different class of modes from the higher order bending and lobar modes which are coupled in all directions. The lowest order (n=0) circumferential and primarily axial modes can easily be identified in the experimental data, however the lowest order radial modes cannot.

Original languageEnglish (US)
Title of host publicationIMAC-XXVII: Conference and Exposition on Structural Dynamics - Model Verification and Validation
StatePublished - 2009
Event27th Conference and Exposition on Structural Dynamics 2009, IMAC XXVII - Orlando, FL, United States
Duration: Feb 9 2009Feb 12 2009

Other

Other27th Conference and Exposition on Structural Dynamics 2009, IMAC XXVII
CountryUnited States
CityOrlando, FL
Period2/9/092/12/09

Fingerprint

Pipe flow
Modal analysis
Boundary layers
Damping
Pipe
Aluminum
Water

All Science Journal Classification (ASJC) codes

  • Engineering(all)
  • Computational Mechanics
  • Mechanical Engineering

Cite this

Bonness, W. K., Fahnline, J. B., & Capone, D. (2009). Three dimensional experimental modal analysis on a water filled cylindrical shell. In IMAC-XXVII: Conference and Exposition on Structural Dynamics - Model Verification and Validation
Bonness, William Kris ; Fahnline, John Brian ; Capone, Dean. / Three dimensional experimental modal analysis on a water filled cylindrical shell. IMAC-XXVII: Conference and Exposition on Structural Dynamics - Model Verification and Validation. 2009.
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Bonness, WK, Fahnline, JB & Capone, D 2009, Three dimensional experimental modal analysis on a water filled cylindrical shell. in IMAC-XXVII: Conference and Exposition on Structural Dynamics - Model Verification and Validation. 27th Conference and Exposition on Structural Dynamics 2009, IMAC XXVII, Orlando, FL, United States, 2/9/09.

Three dimensional experimental modal analysis on a water filled cylindrical shell. / Bonness, William Kris; Fahnline, John Brian; Capone, Dean.

IMAC-XXVII: Conference and Exposition on Structural Dynamics - Model Verification and Validation. 2009.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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AB - Results from an experimental modal analysis on a waterfilled cylindrical shell are compared with a corresponding analytic model solution. The resulting modal parameters are used to determine directional forces from turbulent boundary layer pipe flow excitation. The thin-walled, 24-inch long, aluminum shell has clamped end conditions imposed within a section of a continuous pipe. Mode shapes, damping, in vacuo and water-filled resonance frequencies, and modal masses are evaluated. The three dimensional shell response to all three coordinate excitations is examined and compared. Directional coupling exists for all shell modes except the lowest order (n=0: "breathing") modes. These modes represent a different class of modes from the higher order bending and lobar modes which are coupled in all directions. The lowest order (n=0) circumferential and primarily axial modes can easily be identified in the experimental data, however the lowest order radial modes cannot.

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Bonness WK, Fahnline JB, Capone D. Three dimensional experimental modal analysis on a water filled cylindrical shell. In IMAC-XXVII: Conference and Exposition on Structural Dynamics - Model Verification and Validation. 2009