Abstract
The decoupling analysis of vertical vibration and pitching vibration is the basis of improving vehicle comfort performance and realizing vehicle body vibration control. In order to study the coupling behavior of vehicle body vibration, the vibration characteristics of the suspension and the body are analyzed through mathematical modeling and vibration tests. The research shows that the vibration characteristics of the front and rear suspensions are the key factors affecting the coupling between the vertical vibration and the pitching vibration. By controlling the difference ξ between the square of the rotating radius of the body and the product of the distance from the center of mass to the front and rear axles, the correlation between front and rear suspension vibration and the coupling of the body vibration can be reduced effectively. Through the reasonable matching of front and rear suspension stiffness, the ξ value can be reduced effectively. The research results provide a theoretical basis and reference for mastering the coupling mechanism between vertical vibration and pitching vibration and for the body vibration control.
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