Friday, September 23, 2005
1:00pm – 2:00pm
Professor Nick Vlahopoulos
Department of Naval Architecture & Marine Engineering
Mechanical Engineering
University of Michigan
Applications And Validation of Energy Based Methods
In Structural Acoustics
Abstract:
The Energy Finite Element Analysis (EFEA) is a finite element approach for computing high frequency vibrations and for simulating the structural Ð acoustic behavior of large scale structures. The primary variables in the EFEA are space averaged over a wave length and time averaged over a period energy densities. The governing differential equations of the EFEA are derived from a wave based approach. In addition to the EFEA, an Energy Boundary Element Analysis (EBEA) method has been developed for high frequency exterior acoustic simulations, and a hybrid FEA method has been developed for coupling conventional finite elements with EFEA.
In this presentation the theoretical background of the EFEA will be discussed briefly.
Several applications where experimental data have been compared to simulation results
will be presented in order to demonstrate the capabilities and the value of the three
aforementioned energy based methods.