Optimal Design of Acoustical Foam Treatments

[+] Author and Article Information
Yeon June Kang, J. Stuart Bolton

1077 Ray W. Herrick Laboratories, School of Mechanical Engineering, Purdue University, West Lafayette, IN 47907-1077

J. Vib. Acoust 118(3), 498-504 (Jul 01, 1996) (7 pages) doi:10.1115/1.2888212 History: Received May 01, 1995; Online February 26, 2008


A finite element model for elastic porous materials is presented that allows for interfaces with adjacent acoustical media that are arbitrarily oriented with respect to the global coordinate system. The foam finite element is based on a complete elastic porous material theory that can account for all the three wave types known to be significant in foams. Example problems are used to illustrate the application of foam finite elements to the optimal design of a foam wedge terminating a waveguide. The wedge angle is used as a design parameter (while the wedge volume is held constant) and the performance measure is the frequency-averaged absorption coefficient.

Copyright © 1996 by The American Society of Mechanical Engineers
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