The use of simple three-dimensional acoustic finite elements for determining the natural modes and frequencies of complex shaped enclosures
暂无分享,去创建一个
Abstract Tetrahedral and cuboid finite elements, with a linear variation of the pressure between the nodes, are used for finding the natural frequencies and modes of an acoustic enclosure. The first part of the paper is concerned with testing the elements on a parallelepiped enclosure. It is shown that the solution converges to the exact solution as 1 1/ N 2 where N is the order of a three-dimensional grid. In the final part the method is used for calculating the modes and frequencies of the passenger enclosure of a car and good agreement is shown with existing experimental results.
[1] G Jennquin,et al. IS THE COMPUTATION OF NOISE LEVEL INSIDE A CAR FEASIBLE , 1972 .
[2] O. Zienkiewicz. The Finite Element Method In Engineering Science , 1971 .
[3] Ivar Holand,et al. Finite element methods in stress analysis , 1969 .
[4] A. Craggs. The transient response of a coupled plate- acoustic system using plate and acoustic finite elements , 1971 .