Acoustic Modeling and Optimization of Seat for Boom Noise

971950

05/20/1997

Event
SAE Noise and Vibration Conference and Exposition
Authors Abstract
Content
Results of acoustical simulation of a vehicle with seats is presented in this paper, providing some basic understanding how the geometry of the seats as well as the acoustical properties of the seat material can affect the acoustical behavior of the interior. Both a finite element model and a boundary element acoustical model for a minivan with seats are generated. The influence of a change of seat geometry on modes and response is calculated first. In addition, the effects of acoustical properties of the seat material, i.e. airflow resistivity, on absorption respectively boom reduction is investigated.
The simulation results have shown that the geometry of the seats has to be modeled quite accurately in order to achieve good simulation results. It has been found that rather small changes of the seat model may cause noticeable changes in modal behavior and acoustical response. Moreover, it is demonstrated how the airflow resistance of the seat material can have a large effect on the acoustical response at low frequency in a vehicle, especially by modifying the natural frequencies and loss factors of longitudinal modes.
Following these simulation results, a vehicle has been tested with seats made of different materials and also with different geometrical modifications. The test results are in good agreement with the simulation results.
Meta TagsDetails
DOI
https://doi.org/10.4271/971950
Pages
9
Citation
Qian, Y., and VanBuskirk, J., "Acoustic Modeling and Optimization of Seat for Boom Noise," SAE Technical Paper 971950, 1997, https://doi.org/10.4271/971950.
Additional Details
Publisher
Published
May 20, 1997
Product Code
971950
Content Type
Technical Paper
Language
English