Abstract
When using the finite element method for structural–acoustic coupled analysis, the mass and stiffness matrices are not symmetric because the acoustic space is described by sound pressure and the st...
Highlights
To reduce interior noise in transportation vehicles, structural–acoustic coupled analyses have been performed using the finite element method (FEM).1–3 Craggs4 and Everstine et al.5 gave equations of motion in FEM for the structural–acoustic coupled problem
To analyze the coupled problem of a two-dimensional acoustic space in a rectangular plate-shaped space and membrane vibration, we propose a concentrated mass model that consists of masses and connecting springs
The acoustic space and membrane are both modeled as a concentrated mass model
Summary
To reduce interior noise in transportation vehicles, structural–acoustic coupled analyses have been performed using the finite element method (FEM).1–3 Craggs4 and Everstine et al.5 gave equations of motion in FEM for the structural–acoustic coupled problem. Considering the variation in the volume next to the membrane using the displacements of the mass points of the membrane and acoustic space, the sound pressure in element [Nx, j] is given by dpNx, j
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