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COWL X-BAR 중량 및 N.V.H 성능 개선을 위한 설계 인자 연구
정익진(IkJin Jung),홍인표(Inpyo Hong),송상래(Sangra Song) 한국자동차공학회 2005 한국자동차공학회 춘 추계 학술대회 논문집 Vol.2005 No.11_2
The cowl cross bar is the frame of crash pad assy. It protects a passenger in the collision and has influence on the NVH of STEER'G WHEEL. But the existing design is bad from a weight's point of view. So this study improves NVH of the STEER'G WHEEL by optimization design and discusses how to reduce the weight.
한진우(Jinwoo Han),유종남(Jongnam You),조진호(Jinho Cho),이원구(Wonku Lee),송상래(Sangrae Song) 한국소음진동공학회 2015 한국소음진동공학회 학술대회논문집 Vol.2015 No.4
In this study, the improvement vehicle exterior idle noise without changing source(engine) but developing vehicle body part were investigated. Contribution of each component identification, quantification techniques for each component, achievement of basic technology was conducted. The main problem areas were identified through a sound camera. The contribution of each component of the noise reduction was quantified through PBNR (Power Based Noise Reduction) technique. When we improve this PBNR value, we achieved competitive vehicle exterior idle noise.