FEM/BEM Studies on the Interior Acoustics of a Car Contents

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LMS Conference Europe, 22. & 23. March 2006www.novicos.deResults <strong>FEM</strong> acoustics (4)! Eigenmodes of the passenger compartmentca. 43 Hzca. 83 Hzca. 92 Hzca. 125 Hz
LMS Conference Europe, 22. & 23. March 2006www.novicos.deAcoustic Transfer Functions (1)! ATF is an acoustic transfer function, which gives the relationbetween the normal displacements/velocities at a surface nodeand the sound pressure at a given field point.node 1{v 1 (f)}{ATF 1 (f)}{p (f)} = ?{ATF N (f)}field pointsurface meshnode N{v N (f)}The matrix of all ATF i (f)characterizes the acousticbehavior of a BE model.
Page 2: Introduction! Objectives:Investigat
Page 6 and 7: Mesh preparation (3)! Closing of ho
Page 8 and 9: Mesh Wrapping (2)! Leads to BE mesh
Page 11 and 12: Transfer of structural eigenmodes!
Page 13 and 14: LMS Conference Europe, 22. & 23. Ma
Page 15: LMS Conference Europe, 22. & 23. Ma
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FEM/BEM Studies on the Interior Acoustics of a Car Contents

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