基于有限元模拟的谐波传动中齿干涉分析

利用有限元法对因杯形柔轮变形所引起的齿干涉进行分析研究。利用UG三维软件建立谐波传动中椭圆凸轮式波发生器、杯形柔轮和刚轮的三维模型,并以Parasolid格式导入ANSYS有限元软件中进行分析。采用点—面接触单元模拟柔轮与波发生器的相互接触状况,柔轮的变形更加接近于实际工作状态。在空载情况下,模拟谐波传动的啮合过程,以变形后的杯形柔轮为对象,分析了由其径向位移与切向位移引起的齿干涉现象,提出了一种观察齿干涉情况的新方法,对谐波传动装置的优化具有参考价值。

The Analysis of the Tooth Interference of the Harmonic Drive by the Finite Element Analysis

The tooth interference caused by the cup-shaped flexspline deformation is analyzed with the finite element method.Using UG software to build 3D models of the elliptical cam wave generator,the cup-shaped flexspline and the rigid gear,the models are imported to the ANSYS finite element software by Parasolid format and analyzed.The Node-Surface contact element to solve the contacting problem between the flexspline and the wave generator is put forward,so that the deformed flexspline is more approximate to the actual working conditions.Under no load condition,by taking the deformed cup-shaped flexspline as the object,the tooth interference caused by the radial displacement and the circumferential displacement is analyzed,and a method to observe the phenomenon of the tooth interference is proposed,and it provides a reference to the optimization for the harmonic drive.