http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
재질 별 마찰곡선을 반영한 마찰소음 유한요소 해석 연구
백종수(Jongsu Baek),남재현(Jaehyeon Nam),도현철(Hyuncheol Do),강재영(Jaeyoung Kang) 대한기계학회 2016 大韓機械學會論文集A Vol.40 No.5
본 연구는 마찰 특성이 다른 재질 별로 마찰에 의한 소음을 해석하는 스퀼 유한요소 해석 방법론을 제안하고 이를 실험 검증하고자 하였다. 회전운동 실험 장치를 통하여 각 재질 별 마찰곡선을 확인하였으며, 왕복운동 시험 장치에서 재질 별 마찰 소음을 계측하였다. 계측 된 마찰곡선을 특정 속도에서 선형화하여 마찰곡선 기울기 데이터를 FE Model에 적용하였다. 제안 된 해석 모델에서 발현 된 불안정 모드가 시험에서 발생한 스퀼 주파수와 유사함을 보였다. This study provides the finite-element (FE) squeal-model predicting friction-induced noise with respect to several friction materials that have different friction characteristics. The friction curve and the corresponding friction noise were measured for four friction materials (Cu, Ni, Al, Mg) using the pin-on-disk and reciprocating friction system. The slope of the friction curve linearized at the sliding velocity was applied to the FE model. The unstable modes in the complex eigenvalue analysis were shown to correspond to the squeal frequencies that existed in the experiment.
패키지트레이 차일드앵커 커버의 래틀 소음 개선을 위한 실험적 연구
양정민(Jeongmin Yang),이철현(Chulhyun Yi),이상익(Sangik Lee),도현철(Hyuncheol Do),김영환(Younghwan Kim) 한국자동차공학회 2019 한국자동차공학회 학술대회 및 전시회 Vol.2019 No.11
Increasing amount of automotive technological innovation is driving manufactures to strengthen their NVH performance than ever before. To effectively test and evaluate NVH performance of automotive parts many NVH measuring techniques are under development. One of which is testing for BSR noise. BSR is induced by micro-interactions between vibrating automotive parts that cause discomforting noise to the driver. Unlike NVH issues, due to its intermittent behavior of BSR noise, the best approach to manage BSR is to eliminate its source than try to decrease its noise level. The BSR improvement discussed in this paper is about BSR noise becoming apparent after changing the design of child anchor attached to the package tray. Functionally the part had no problem, yet rattle noise had been developed over time. This paper proposes analyzing and eliminating the problematic noise source through experimental study to enhance noise performance.