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Combining Energy Boundary Element and Energy Finite Element Simulations for Airborne Noise Analysis

[+] Author Affiliations
Nickolas Vlahopoulos

University of Michigan

Sheng Li

Dalian University of Technology

Jiulong Sun

Michigan Engineering Services, LLC

Paper No. IMECE2006-14117, pp. 187-191; 5 pages
doi:10.1115/IMECE2006-14117
From:
  • ASME 2006 International Mechanical Engineering Congress and Exposition
  • Noise Control and Acoustics
  • Chicago, Illinois, USA, November 5 – 10, 2006
  • Conference Sponsors: Noise Control and Acoustics Division
  • ISBN: 0-7918-4776-4 | eISBN: 0-7918-3790-4
  • Copyright © 2006 by ASME

abstract

The Energy Boundary Element Analysis (EBEA) has been utilized in the past for computing the exterior acoustic field at high frequencies (above ~400Hz) around vehicle structures and numerical results have been compared successfully to test data. The Energy Finite Element Analysis (EFEA) has been developed for computing the structural vibration of complex structures at high frequencies and validations have been presented in previous publications. The frequency range of applicability of the EFEA depends on the dynamic characteristics of the structure. In this paper the EBEA is utilized for computing the acoustic field around a vehicle structure due to external acoustic noise sources. The computed exterior acoustic field comprises the excitation for the EFEA analysis. Appropriate loading functions have been developed for representing the exterior acoustic loading in the EFEA simulations, and a formulation has been developed for considering the acoustic treatment applied on the interior side of structural panels. In order to demonstrate how the new developments can be combined in airborne noise applications, a case study is presented.

Copyright © 2006 by ASME

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