Optimization design and performance characteristics of involute spur gear with tooth profile modification

Abstract

newline To achieve high load carrying capacity with reduced weight of gear drives but with increased strength in gear transmission, gear tooth stress analysis, tooth modifications and design optimization of gear drives are flattering most important research area. The objectives of the present study are to study the effects of tooth stresses and tooth deflection in optimized spur gear drive, to study the effects of these performance parameters in the addendum and centre distance modified spur gears at critical locations of single tooth contact and to develop a novel method to design and model crowned spur gears. The performance parameters of standard and crowned spur gears were determined through Finite Element Analysis (FEA). Contact parameters viz. contact stress, normal displacement and tooth mesh stiffness were hypothetically determined at the contact area. newlineClassical spur gear design crisis was converted into a design optimization problem. Two independent design variables, two non-linear objective functions and four non-linear inequality constraints were considered. Constrained optimization problem was converted into unconstrained through penalty function. Also, multi-objective functions were mapped into single objective function using weighted sum method. Genetic Algorithm (GA), a non-traditional optimization technique was used to solve the problem newline