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- 저자 : Jozˇe Duhovnik (검색결과 2 건)
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A multicriteria function for polymer gear design optimization
Jozˇe Tavcˇar,Borut Cˇerne,Jozˇe Duhovnik,Damijan Zorko 한국CDE학회 2021 Journal of computational design and engineering Vol.8 No.2
A reliable method of optimization of polymer gears remains, to date, an open challenge, due to the lack of specific material characterization of polymers and to the complex nonlinear relations between different geometric and operating parameters. For spur and helical gears, the authors herein have developed the optimization algorithm, which primarily enables variation of geometry according to various criteria: the number of teeth (z1, z2), face width (b), helix angle (β), and normal module (mn). The method enables a better insight into how design parameters influence the target criteria. The main paper contribution is a newly developed multicriteria function that enables a simultaneous consideration of different criteria such as root/flank stress, gear bulk/flank temperature, wear, deformation, quality, cost, and volume.
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Borut Cˇerne,Jozˇe Duhovnik,Jozˇe Tavcˇar 한국CDE학회 2019 Journal of computational design and engineering Vol.6 No.4
The temperature increase that occurs during running of a polymer gear pair can be divided into two com-ponents: the nominal and flash temperatures. The latter denotes the short-term temperature increase that takes place during a gear meshing cycle. A thorough analysis of the flash temperature yields an insight into the heat dissipation process, which also determines the nominal temperature increase. We focus here on the flash component using numerical and analytical computation tools, with which we can obtain realistic predictions of the temperature increase during a gear meshing cycle. The analysis is performed using a decoupled procedure that involves a mechanical finite element analysis, followed by a semi-analytical temperature evaluation method based on the computed mechanical response of the system. With it, we obtain an improved flash temperature model that offers an accurate representa-tion of the real life thermo-mechanical processes taking place at the gear teeth contact interfaces.
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