Open Science Research Excellence
%0 Journal Article
%A Y. Kurosawa and  T. Yamaguchi
%D 2013 
%J  International Journal of Mechanical and Mechatronics Engineering
%B World Academy of Science, Engineering and Technology
%I International Science Index 78, 2013
%T Finite Element Analysis for Damped Vibration Properties of Panels Laminated Porous Media
%V 78
%X A numerical method is proposed to calculate damping
properties for sound-proof structures involving elastic body,
viscoelastic body, and porous media. For elastic and viscoelastic body
displacement is modeled using conventional finite elements including
complex modulus of elasticity. Both effective density and bulk
modulus have complex quantities to represent damped sound fields in
the porous media. Particle displacement in the porous media is
discretised using finite element method. Displacement vectors as
common unknown variables are solved under coupled condition
between elastic body, viscoelastic body and porous media. Further,
explicit expressions of modal loss factor for the mixed structures are
derived using asymptotic method. Eigenvalue analysis and frequency
responded were calculated for automotive test panel laminated
viscoelastic and porous structures using this technique, the results
almost agreed with the experimental results.
%P 1320 - 1326