同步带带齿啮合应力仿真与分析

SIMULATION AND ANALYSIS OF TOOTH ENGAGEMENT PRESSURE OF SYNCHRONOUS BELT

同步带材料复杂、形状复杂等因素,造成其在正常运行时有复杂的力学行为。这些因素导致对带齿切向负载进行理论计算困难,为解决这一问题,提出一个用于计算带齿与带轮啮合部分受切向压力的矩阵模型。矩阵模型中采用弹簧替代同步带与带轮之间接触,对同步带进行离散化处理,分离为独立带元。采用多体动力学软件RecurDyn对同步带传动系统进行仿真,验证模型的正确性。结果表明,计算结果与仿真结果在啮合部分带齿受切向压力较大的首尾处结果相近,啮合中间部分受切向压力较小处存在一定误差。该矩阵模型相对于其他方法计算量较小,解决了带齿切向压力计算困难的问题,为同步带选型和设计优化提供了理论基础。

Due to the complex material and shape of synchronous belt,it has complex mechanical behavior in normal operation.To solve this problem,propose a matrix model to calculate the tangential pressure of the meshing part between tooth and pulley.In the matrix model,use spring to replace the contact between synchronous belt and pulley,synchronous belt was discretized and separated into independent parts.In order to verify the model correctness,multi⁃body dynamics software RecurDyn was used to simulate the synchronous belt transmission system.The results show that the calculated results is closed to simulation results at the beginning and the end of the meshing part where the tangential pressure is larger,and there are some difference in the meshing part where the tangential pressure is smaller.Comparing with other methods,the matrix model has less computation,which solves the difficulty of calculating the tangential pressure of the belt,and provides a theoretical basis for the selection and design optimization of synchronous belt.