Parametric Optimization of Planetary Carrier for Durability 2019-26-0049
Planetary gear set is one of the most commonly used gear systems in automotive industry as it caters to high power density requirements. A simple planetary gear set consists of a sun gear, ring gear, planets and carrier which houses planet gears. Efficiency of a transmission is dependent upon performance of gear sets involved in power transfer to a great extent. Structural rigidity of a planetary carrier is critical in a planetary gear set as its deflection may alter the load distribution of gears in mesh causing durability and noise issues. Limited studies exist based on geometrical parameters of a carrier which would help a designer in selecting the dimensions at an early stage.
In this study, an end to end automated FEA process based on DOE and Optimization in Isight is developed. The method incorporates a workflow allowing for an update to carrier geometry, FE model setup, analysis job submission and post-processing of results. Deflection and stresses at critical locations of Carrier are the output parameters considered for optimization.
This paper provides an understanding of Carrier behavior involved in power transfer and workflow development using Isight. Parametric studies are performed to evaluate the influence of Carrier geometry over design requirements in stress and deformation. This study would be a reference for a gearbox designer to arrive at optimum design satisfying mass and strength requirements.
KEYWORDS: Planetary Carrier, DOE, Isight, Parametric Optimization
Vinay Maruthi Ambarkar, Yogesh Dewangan, Derrick Black
General Motors Technical Center India
Symposium on International Automotive Technology 2019