Hybrid Hertzian and FE-Based Helical Gear-Loaded Tooth Contact Analysis and Comparison with FE

摘要

A loaded tooth contact analysis model for helical gears combining an FE representation of bending and base rotation stiffness of teeth with a Hertzian contact formalism for contact stiffness is presented. Comparison with full 3-D FE contact analysis and the tooth contact analysis program LDP is made. Correlation with the 3-D FE contact analysis is good. For the low-helix angle gear pair under consideration, it is shown that it is important to include the phenomenon of extended contact at the tips of the gear teeth in such hybrid tooth contact models for correlation with the FE analysis at high loads. It is further shown that LDP underestimates the mean transmission error for helical gears when compared to the FE analysis results. A possible cause of this underestimation is presented. A second helical gear example is presented with comparison with results available in the literature.