The improvement of car driving comfort is requested according to development of automobile manufacturing technology. Therefore, many experts have been studying automotive vibration of normally driving cars to improve automotive driving comfort. Vibration characteristics of a tire play an important role to judge a ride comfort ability and sound quality for a vehicle. A lots of study on the ride and the noise to reduce the vibration in the 20∼100Hz frequency range was being carried out for years. The tire impact due to the bump is the main factor of the vibration in the 20∼100Hz. This vibration is related to the harshness which perceive the displeasure or noise. In this study, we investigated the characteristics of the impact harshness due to the stiffness of the tire tread part according to change the tread compound.

Abstract
 1. 서론
 2. 타이어의 강성 및 하쉬니스 특성
  2.1 실험방법
  2.2 실험결과 및 고찰
 3. 결론
 후기
 참고문헌

• 김병삼(원광대학교 공과대학 기계자동차공학부) | Byoung-Sam Kim
• 이태근(대덕대학교 정밀기계공학과) | Tae-Keun Lee Corresponding Author