Modeling Point Excited Plates Using an Energy Finite Element Method

This paper describes how statistical energy analysis (SEA) is one method that is commonly used for high frequency analysis of complex systems. In the derivation of SEA, it is assumed that the system consists of lightly damped, lightly coupled mode groups that transfer energy between coupled structures. The paper shows how SEA is effective and useful for cases where these assumptions are not violated. However, continuous systems exhibiting moderate coupling or spatial response decay due to damping should not be modeled using SEA. A second method, energy flow analysis (EFA) has been proposed to predict the response of systems for cases of moderate damping and coupling. The practicality of EFA based on a model of lossy plane wave decay has been questioned in past work. The development and validation of a modeling approach using a lossy plane wave energy finite element method (EFEM) that is applicable to the point excited plate is proposed and validated in this paper.

• Corporate Authors:

  Institute of Noise Control Engineering

  Iowa State University, 210 Marston Hall
  Ames, IA  United States  50011-2153

  Transportation Research Board

  500 Fifth Street, NW
  Washington, DC  United States  20001
• Authors:
  • Klos, Jacob
• Conference:
  • Noise-Con 04. The 2004 National Conference on Noise Control Engineering
  • Location: Baltimore Maryland, United States
  • Date: 2004-7-12 to 2004-7-14
• Publication Date: 2004

Language

• English

Media Info

• Media Type: CD-ROM
• Features: Figures; References; Tables;
• Pagination: pp 355-366
• Monograph Title: Noise-Con 04. The 2004 National Conference on Noise Control Engineering

Subject/Index Terms

• TRT Terms: Damping (Engineering); Energy; Finite element method; Noise barriers; Noise control; Noise generators; Noise sources; Sound level meters; Sound transmission; Statistical analysis; Structural plates
• Subject Areas: Aviation; Data and Information Technology; Energy; Environment;

Filing Info

• Accession Number: 01054183
• Record Type: Publication
• Files: TRIS, TRB
• Created Date: Jul 24 2007 10:56AM