Abnormal cab vibrations in the Y direction in commercial vehicles during driving(70~90kph) are not common vibrations that happen to vehicles during driving and can be an obstacle to normal driving. This study conducted Operation Deflection Shape(ODS) testing to identify the causes of those abnormal cab vibrations and find solutions for them and also a sine sweep test to find resonance and frequency in the cab suspension system and set directions for improvement. The study also altered the shape of the bush inner part for changes to the rigidity features of the cab bush in the Y direction and revised the design with optimal rigidity in the Y direction, thus improving abnormal cab vibrations in the Y direction during driving.

Abstract
 1. 서 론
 2. 본 론
  2.1절 Cab Y Axial 진동 원인의 시험적 분석
  2.2절 Cab 진동 저감을 위한 해석
  2.3절 Cab Y axial Pivot Bush의 최적 설계
  2. 4장 Cab Y axial 진동의 시험적 검증
 3. 결 론
 References

• 최병재(한양대학교) | Byungjae Choi
• 김병삼(원광대학교 공과대학 기계자동차공학부) | Byoung-Sam Kim