This content is not included in your SAE MOBILUS subscription, or you are not logged in.
Testing and Simulation of Anti-Flutter Foam and High Damping Foam in a Vehicle Roof Structure
ISSN: 0148-7191, e-ISSN: 2688-3627
Published May 13, 2013 by SAE International in United States
Annotation ability available
The excitation of structural modes of vehicle roofs due to structure-borne excitations from the road and powertrain can generate boom and noise issues inside the passenger cabin. The use of elastomeric foams between the roof bows and roof panel can provide significant damping to the roof and reduce the vibration. If computer-aided engineering (CAE) can be used to predict the effect of elastomeric foams accurately on vibration and noise, then it would be possible to optimize the properties and placement of foam materials on the roof to attenuate vibration. The properties of the different foam materials were characterized in laboratory tests and then applied to a flat test panel and a vehicle body-in-white. This paper presents the results of an investigation into the testing and CAE analysis of the vibration and radiated sound power of flat steel panels and the roof from the BIW of an SUV with anti-flutter foam and Terophon® high damping foam (HDF) materials. The test program was conducted using a scanning laser vibrometer to measure the surface vibration and a sound intensity probe to measure radiated sound power. The structural and acoustic responses of the panel and roof have been normalized to the input force. In parallel with the flat panel, finite element CAE simulation of the foam materials in the panel tests was performed and the results compared to the test results using different finite element (FE) foam modeling techniques. The results of this work are presented and discussed.
CitationStotera, D., Connelly, T., Gardner, B., Seifferlein, E. et al., "Testing and Simulation of Anti-Flutter Foam and High Damping Foam in a Vehicle Roof Structure," SAE Technical Paper 2013-01-1944, 2013, https://doi.org/10.4271/2013-01-1944.
- Wojtowicki , J. and Panneton , R. Improving the Efficiency of Sealing Parts for Hollow Body Network SAE Technical Paper 2005-01-2279 2005 10.4271/2005-01-2279
- Chevillotte , F. , Panneton , R. , Wojtowicki , J. , and Chaut , C. Characterization of the Bulk Elastic Properties of Expanding Foams from Impedance Tube Absorption Tests SAE Technical Paper 2007-01-2191 2007 10.4271/2007-01-2191
- Siemens NX Nastran User Guide Siemens Product Life Cycle Management Software Inc. 2011
- ESI VA One Foam 2012 User's Guide, Theory and QA ESI Group 2012
- Atalla N. , Panneton R. , and Debergue P. A mixed pressure displacement formulation for poroelastic materials J. Acoust. Soc. Am. 104 1444 1452 1998
- Debergue P. , Panneton R. , and Atalla N. Boundary conditions for the weak formulation of the mixed ( u , p ) poroelasticity problem J. Acoust.Soc. Am. 106 2383 2390 1999
- Atalla N. , Hamdi M.A. and Panneton R. Enhanced weak integral formulation for the mixed ( u o ,p o ) poroelastic equations J. Acoust. Soc. Am. 109 6 3065 3068 2001
- Mebarek L. , Lullier S. , Kobayashi Y. , Blanchet D. Modelling of Transmission loss for trimmed vehicle components JSAE 2007
- Anciant M. , Mebarek L. , Zhang C. , Monet-Descombey J. Full Trimmed Vehicle Simulation by using RAYON-VTM JSAE 2007
- Brüel & Kjær booklet BR0476 Sound Intensity Primer Sep. 1993