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http://dx.doi.org/10.5139/JKSAS.2020.48.12.953

Optimization of Gear Webs for Rotorcraft Engine Reduction Gear Train  

Kim, Jaeseung (Korea Institute of Machinery and Materials)
Kim, Suchul (Korea Institute of Machinery and Materials)
Sohn, Jonghyeon (Korea Institute of Machinery and Materials)
Moon, Sanggon (Korea Institute of Machinery and Materials)
Lee, Geunho (Korea Institute of Machinery and Materials)
Publication Information
Journal of the Korean Society for Aeronautical & Space Sciences / v.48, no.12, 2020 , pp. 953-960 More about this Journal
Abstract
This paper presents an optimization of gear web design used in a main gear train of an engine reduction gearbox for a rotorcraft. The optimization involves the minimization of a total weight, transmission error, misalignment, and face load distribution factor. In particular, three design variables such as a gear web thickness, location of rim-web connection, and location of shaft-web connection were set as design parameters. In the optimization process, web, rim and shaft of gears were converted from the 3D CAD geometry model to the finite element model, and then provided as input to the gear simulation program, MASTA. Lastly, NSGA-II optimization method was used to find the best combination of design parameters. As a result of the optimization, the total weight, transmission error, misalignment, face load distribution factor were all reduced, and the maximum stress was also shown to be a safe level, confirming that the overall gear performance was improved.
Keywords
Gear Train; Optimization; Transmission Error; Misalignment; Face Load Distribution Factor; MASTA;
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