A Study of Front Subframe System Optimization for Improving Vehicle NVH Performance
Date Published: 2009-05-19
Paper Number:2009-01-2097
DOI: 10.4271/2009-01-2097
Citation:
Park, S., Park, D., Yoon, K., and Lee, M., "A Study of Front Subframe System Optimization for Improving Vehicle NVH Performance," SAE Technical Paper 2009-01-2097, 2009, doi:10.4271/2009-01-2097.
Author(s):
Sang-Young Park - Hyundai Motor & Kia Motors Corp.
Dong-Chul Park - Hyundai Motor & Kia Motors Corp.
Ki-Soo Yoon - Hyundai Motor & Kia Motors Corp.
Min-Seop Lee - Hyundai Motor & Kia Motors Corp.
Abstract:
The purpose of this article is to investigate the links between NVH performances of a car such as booming, road noise and dynamic characteristics of its front subframe system. The target of dynamic property of the subframe members was set through a contribution analysis. The Booming noise was refined by improving the structural dynamic stiffness of relevant subframe members and optimizing the dynamic stiffness of subframe mount bushes considering the frequency property of the engine exciting force. In the light of NVH, merits and demerits of a solid mounted subframe for various powertrain types were examined, and several countermeasures such as structural reinforcement, dynamic dampers and dynamic characteristics of A and G bushes were applied and suggested.
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