Harmonic drive can have a high nonlinear dynamic behavior. In order to find a way to simulate its operating process and evaluate its performance, this paper gave an introduction of different methods of tooth contact analysis (TCA) and found out that explicit dynamics as a newly used tool for TCA is the most suitable one. Because the harmonic drive’s high contact ratio and uncertainty of contact boundary match with explicit dynamics’ features of explicit algorithm, trajectory detection to deal with contact. A harmonic drive with a new tooth profile has been modeled in Ansys Workbench and solved by explicit dynamics solver. According to the results, the deformation of the simulation model has been compared with the theoretical calculation and experimental observation to make sure that the model reflects the harmonic drive’s elastic behavior correctly. And the nonlinear behavior of the harmonic drive including high contact ratio and output’s hysteresis effect can be predicted by explicit dynamics. So explicit dynamics can offer a new way to simulate harmonic drive’s working process. As a general case of gear drive, this method is possible to be widely adopted by gear industry in the future. Furthermore, the contact ratio and root fillet stress results show that the new tooth profile can significantly reduce the stress concentration to increase the fatigue life of the harmonic drive.

This content is only available via PDF.
You do not currently have access to this content.