Abstract
In the vehicle industry, the structure-borne noise is significantly important because drivers require the smooth driving with less vibration and noise. In the case of the structure-borne noise, it is caused by the vibration transmitted through vehicle structure. Especially, amplification and damping of the vibration transmitted through vehicle structure are generated by passing the components on the transmission path. Thus, the dynamic characteristics and the dynamic response of vehicle suspension that is a main transmission path of the vibration should be preferentially considered to reduce the structure-borne noise effectively. In this paper, we construct a finite element model of vehicle front suspension considering the nonlinear damping characteristics of strut-damper internal fluid and it is validated with experimental results. Using this model, the dynamic response of vehicle front suspension is analyzed and parametric study is also conducted to improve the dynamic response of vehicle front suspension. As a result, stiffness increase of strut-damper upper mount seems to be the most effective method for improving the dynamic response of vehicle front suspension.
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