【摘要】 由于装配、制造误差等原因,运动副中的间隙是不可避免的。为了研究转动副间隙对系统动态特性的影响,建立了一种含间隙转动副的非线性碰撞力模型,同时采用基于库仑摩擦定律的Threfall力模型描述间隙处的摩擦作用。将含间隙副的两轴液压振动试验系统模型嵌入到ADAMS动力学分析软件中进行动力学仿真分析,仿真结果表明:在异步简谐激励下,间隙尺寸和激振频率对液压振动试验系统的加速度响应特性都有很大影响,间隙越大,激振频率越高,加速度响应峰值越大,但对位移响应影响较小。更多还原

【Abstract】 Clearance in joints of motion is inevitable due to assembly and manufacturing errors and so on. Here,non-linear contact force model related to a clearance joint was established in order to investigate the influence of a revolute joint with clearance on dynamic behavior of a system with this revolute joint,and the friction effect was considered by using Threfall force model based on Coulomb’s friction law. Dynamic simulation investigation was performed by embedding a two-axis hydraulic vibration test system having a revolute joint with clearance into ADAMS. The simulation results indicated that there is a large effect of clearance size and excitation frequency on the acceleration response behavior of the hydraulic vibration test system,its peak acceleration response grows with increase in excitation frequency and clearance size; but excitation frequency and clearance size have a slight influence on its displacement response.更多还原