Simulation methods can be used for meeting both the new stealth initiatives for surface ship silencing, and the stringent limits on acceptable hull vibration. Additionally, interior noise concerns must be considered due to habitability and operational readiness. The pursuit of innovative ship designs, utilization of new materials, and the increasingly demanding performance requirements, dictate a more broadly focused thrust for addressing noise and vibration issues due to multiple sources of excitation during the design process. This expanded technical view also requires that the types of tools utilized for these assessments also improve and that they can provide results within a short enough time that can affect the design cycle. An Energy Finite Element Analysis (EFEA) formulation has been developed for computing efficiently the vibration of complex vehicles and the associated radiated noise at frequencies beyond the limits of conventional finite element methods. In this paper, the main theoretical aspects of the EFEA will be presented first. Results are presented for two 1/8th scale structures representing an advanced double hull design and a conventional hull design of a surface ship. Results for the structural vibration induced on the outer bottom part of the structures are compared to available test data.
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ASME 2011 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference
August 28–31, 2011
Washington, DC, USA
Conference Sponsors:
- Design Engineering Division and Computers and Information in Engineering Division
ISBN:
978-0-7918-5478-5
PROCEEDINGS PAPER
Structural-Acoustic Simulations of Naval Vehicles Using an Energy Finite Element Method
Nickolas Vlahopoulos
Nickolas Vlahopoulos
University of Michigan, Ann Arbor, MI
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Nickolas Vlahopoulos
University of Michigan, Ann Arbor, MI
Paper No:
DETC2011-47758, pp. 509-516; 8 pages
Published Online:
June 12, 2012
Citation
Vlahopoulos, N. "Structural-Acoustic Simulations of Naval Vehicles Using an Energy Finite Element Method." Proceedings of the ASME 2011 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. Volume 1: 23rd Biennial Conference on Mechanical Vibration and Noise, Parts A and B. Washington, DC, USA. August 28–31, 2011. pp. 509-516. ASME. https://doi.org/10.1115/DETC2011-47758
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