| DEVELOPMENT OF A DUAL MODE DYNAMIC DAMPER FOR
VIBRATION REDUCTION OF DRIVE SHAFT IN A PASSENGER CAR |
| Kanghyun An1, Haesung Jeong1, Sang Kwon Lee1, Junbaek Jeong2 |
1Inha University
2Hyundai Wia |
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| ABSTRACT |
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When one of the natural frequencies of the drive shaft coincides with the excitation frequency of the engine, the
vibration amplitude of the drive shaft increases significantly owing to the resonance of the drive shaft at the natural frequency.
To reduce this resonance vibration, a single-mode dynamic damper (SMDD) has been used. A dynamic damper yields second
resonances because of the mass and stiffness of the damper, although the resonance vibration of the drive shaft is reduced
considerably. To reduce vibration due to the second resonance, the vibration parameters of the SMDD, such as frequency,
damping coefficient, mass, and stiffness, should be optimized. However, it is difficult to apply an optimized SMDD to a vehicle
because it is difficult to achieve an SMDD with optimal stiffness and damping coefficient. This paper presents a new dualmode
dynamic damper (DMDD) for the further reduction of vibration due to the second resonance. The stiffness and damping
coefficient of the DMDD are changed according to the rotating angle of the drive shaft. The vibration reduction effect of the
SMDD is constant at the positions of all rotating angles of a drive shaft; however, that of the DMDD is different at the position
of every rotating angle of the drive shaft. In this study, the vibration reduction performance of the DMDD is compared with
that of the SMDD. Finally, the DMDD is applied to the drive shaft of a passenger car, and its effect on vibration reduction is
confirmed in a vehicle test. |
| Key Words:
Tuned dynamic damper, Dual mode dynamic damper, Vibration reduction, Drive shaft |
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Corresponding Author.
Sang Kwon Lee , Email. 
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