Modeling of Trim Panels in the Energy Finite Element Analysis.

Point Connected Members Vibration;Energy Finite Element Analysis;Acoustics;Waves in Layered Material;Foam Treated Panels;Mechanical Engineering;Engineering;Mechanical Engineering

Moraveji, Seyed-JavidGrosh, Karl ;

University of Michigan

关键词: Point Connected Members Vibration;    Energy Finite Element Analysis;    Acoustics;    Waves in Layered Material;    Foam Treated Panels;    Mechanical Engineering;    Engineering;    Mechanical Engineering;   

Others  :  https://deepblue.lib.umich.edu/bitstream/handle/2027.42/58476/moraveji_1.pdf?sequence=1&isAllowed=y

瑞士|英语

来源: The Illinois Digital Environment for Access to Learning and Scholarship

【 摘 要 】

Modeling a trim panel is divided into finding the power exchangethrough two different paths: i)the connection of the outer and innerpanels ii) through the layers directly. The vibrational powerexchanged through the mounts is modeled as the connection of twoparallel plates connected via a beam. Wave matrices representingplates and beams are derived separately; then a matrix method isproposed to solve for the wave amplitudes and hence the vibrationalpower exchange between the plates accordingly. A closed form formulafor the case of connection of two identical plates is derived. Forthe power transmission loss directly through the layers, firsttransfer matrices representing layers made of different materials isconsidered. New matrices for a porous layer are derived. A method offinding the layered structure transfer matrix is proposed. It isconcluded that in general a single isotropic layer cannot replace astructure accurately. Finally, on the basis of an equivalenttransfer matrix, an optimization process for is proposed to replacethe panel by a suitable set of layers.