%0 Journal Article
%T Acoustic Modeling of a 3-Layered Panel  Incorporating Electro-Rheological/  Magneto-Rheological (EMR) Fluids
%A Nader Mohammadi
%J Open Journal of Acoustics
%P 1-12
%@ 2162-5794
%D 2014
%I Scientific Research Publishing
%R 10.4236/oja.2014.41001
%X <span style=\"font-size:10pt;font-family:Verdana;\">Applications</span><span style=\"font-size:10.0pt;font-family:;\" \"=\"\"> </span><span style=\"font-size:10pt;font-family:Verdana;\">of Electro-Rheological (ER)</span><span style=\"font-size:10.0pt;font-family:;\" \"=\"\"> </span><span style=\"font-size:10pt;font-family:Verdana;\">or Magneto-Rheological (MR) fluids as typical smart ma</span><span style=\"font-size:10pt;font-family:Verdana;\">terials have been widely investigated over the past decades (since their
introduction in 40</span><span style=\"font-size:10pt;font-family:Verdana;\">กฏ</span><span style=\"font-size:10pt;font-family:Verdana;\">s). The special application</span><span style=\"font-size:10pt;font-family:Verdana;\">s</span><span style=\"font-size:10pt;font-family:Verdana;\"> of these materials as a means of noise suppression </span><span style=\"font-size:10pt;font-family:Verdana;\">are</span><span style=\"font-size:10pt;font-family:Verdana;\"> not yet investigated. Constrained Layer Damping (CLD) sheets can be
realized</span><span style=\"font-size:10pt;font-family:Verdana;\"> by </span><span style=\"font-size:10pt;font-family:Verdana;\">incorporating EMR (ER/MR) materials. </span><span style=\"font-size:10pt;font-family:Verdana;\">In </span><span style=\"font-size:10pt;font-family:Verdana;\">this way,</span><span style=\"font-size:10.0pt;font-family:;\" \"=\"\"> </span><span style=\"font-size:10pt;font-family:Verdana;\">a multilayered damping sheet is obtained with
adaptive (tunable) stiffness and damp</span><span style=\"font-size:10pt;font-family:Verdana;\">ing characteristics. These
properties are easily changed in proportion to the electric (magnetic) field applied
upon the EMR layer.</span><span style=\"font-size:10.0pt;font-family:;\" \"=\"\"> </span><span style=\"font-size:10pt;font-family:Verdana;\">This notion has been introduced for semi-active
vibration con</span><span style=\"font-size:10pt;font-family:Verdana;\">trol problems.</span><span style=\"font-size:10.0pt;font-family:;\" \"=\"\"> </span><span style=\"font-size:10pt;font-family:Verdana;\">Herein, such panels incorporating EMR material </span><span style=\"font-size:10pt;font-family:Verdana;\">are</span><span style=\"font-size:10pt;font-family:Verdana;\"> proposed for adaptive acoustic treatment</span><span style=\"font-size:10pt;font-family:Verdana;\">s</span><span style=\"font-size:10pt;font-family:Verdana;\">. Modeling (simulation) of a 3-layered panel with the middle layer being
EMR with ad</span><span style=\"font-size:10pt;font-family:Verdana;\">justable
%K ER/MR Fluid
%K Multi-Layers Panel
%K Transmission Loss
%U http://www.scirp.org/journal/PaperInformation.aspx?PaperID=43753