TY - GEN
T1 - A fast numerical model for vehicle interior acoustics
AU - Sorosiak, Eric J.
AU - Li, Mingfeng
AU - Lim, Teik C.
AU - Abe, Takeshi
AU - Lee, Ming Ran
AU - Cheng, Ming Te
AU - Vanhaaften, Wayne
PY - 2008
Y1 - 2008
N2 - Vehicle noise, vibration and harshness (NVH) problems can be analyzed using numerical methods such as finite element analysis, which is generally complex and time consuming. In order to speed the analysis and reduce the calculation burden, this paper discusses the development, use and verification of an enhanced, simplified numerical acoustic cavity modeling approach for the analysis of vehicle NVH problems. The proposed simplified vehicle model can incorporate multiple acoustic cavities, such as an engine compartment, passenger compartment, and connecting bulkhead compartment, joined by several flexible panels. The damping matrix of the model is constructed from measured acoustic absorption data and panel properties. Utilizing this modeling approach, both single-cavity and three-cavity models are created, different floor panel configurations are investigated, and transfer functions predicted by these models are compared with corresponding transfer functions from measured data. More specifically, airborne noise created by the structure-borne road noise vibrations introduced into the passenger compartment floor is observed from the perspective of the vehicle occupants. The transfer functions representing the road noise transmission path are determined experimentally and compared with model prediction results. The comparison results imply that the developed simplified model provides reasonable accuracy for the analysis and simulation study.
AB - Vehicle noise, vibration and harshness (NVH) problems can be analyzed using numerical methods such as finite element analysis, which is generally complex and time consuming. In order to speed the analysis and reduce the calculation burden, this paper discusses the development, use and verification of an enhanced, simplified numerical acoustic cavity modeling approach for the analysis of vehicle NVH problems. The proposed simplified vehicle model can incorporate multiple acoustic cavities, such as an engine compartment, passenger compartment, and connecting bulkhead compartment, joined by several flexible panels. The damping matrix of the model is constructed from measured acoustic absorption data and panel properties. Utilizing this modeling approach, both single-cavity and three-cavity models are created, different floor panel configurations are investigated, and transfer functions predicted by these models are compared with corresponding transfer functions from measured data. More specifically, airborne noise created by the structure-borne road noise vibrations introduced into the passenger compartment floor is observed from the perspective of the vehicle occupants. The transfer functions representing the road noise transmission path are determined experimentally and compared with model prediction results. The comparison results imply that the developed simplified model provides reasonable accuracy for the analysis and simulation study.
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M3 - Conference contribution
AN - SCOPUS:84870028104
SN - 9781605605401
T3 - Institute of Noise Control Engineering of the USA - 23rd National Conference on Noise Control Engineering, NOISE-CON 08 and Sound Quality Symposium, SQS 08
SP - 1467
EP - 1476
BT - Institute of Noise Control Engineering of the USA - 23rd National Conference on Noise Control Engineering, NOISE-CON 08 and Sound Quality Symposium, SQS 08
T2 - 23rd National Conference on Noise Control Engineering, NOISE-CON 2008 and 3rd Sound Quality Symposium, SQS 2008
Y2 - 28 July 2008 through 31 July 2008
ER -