【摘要】 在汽车悬架系统中,为了满足其低频振动控制和高频隔振性能的要求,对控制臂衬套动态特性的要求是不一致的。常见的橡胶衬套很难提供在低频振动控制时所需要的大阻尼。液压衬套是一种可在一个较大的频率范围内提供大阻尼和大刚度的振动控制元件,目前它在悬架系统中得到了广泛的应用。介绍了可在径向或轴向方向提供大阻尼和大刚度的两种结构型式的液压衬套,实验测试了它们的静态特性、动刚度和阻尼及其与激振频率和激振振幅的相关性;建立了液压衬套动特性计算分析的集总参数模型,利用该模型计算分析了一液压衬套的动刚度和滞后角,计算结果和实验值的对比结果证明了模型的正确性。最后给出了液压衬套在解决由于路面或车轮不平衡激励而引起方向盘振动问题的应用实例。更多还原

【Abstract】 To meet the requirements of lower frequency vibration control and higher frequency vibration isolation for automotive suspension systems, bushings used in the control arm of a suspension are needed to have different dynamic behaviors. The widely used rubber bushings can’t provide large damping for suppressing vibrations from road and / or wheel unbalance. Hydraulic bushings that can provide large damping and large stiffness in a broad frequency range are now widely used as a lower frequency vibration control component in suspensions. The configurations of two types of hydraulic bushings which can provide large damping and large stiffness in axial- or radial- directions, are introduced firstly. Then the measured static and dynamic characteristics of a hydraulic bushing are given. A lumped parameter model for estimating dynamic performances of a hydraulic bushing is presented, and the dynamic performances of a hydraulic bushing are calculated with the proposed model. Comparison between the results of calculation and experiment indicates the rightness of the proposed model. Finally, some applications of hydraulic bushings for solving NVH (Noise, Vibration and Harshness) problems in suspensions are illustrated.更多还原