Multiple, often conflicting objectives arise naturally in most real-world optimization. Gear is a mechanical device that transfers the rotating motion and power from one part of a machine to another. Searching for best gear is a very hard problem. Gear optimization can be divided into two categories, namely, single gear pair or Gear train optimization. The problem of gear pairs design optimization is difficult to solve because it involves multiple objectives and large number of variables. Therefore a reliable and robust optimization technique will be helpful in obtaining optimal solution for the problems. In this paper an attempt has been made to optimize spur gear pair design using Genetic Algorithm (GA) and analytical tool MITCalc. A combined objective function which maximizes the Power, Efficiency and minimizes the overall Weight, Centre distance has been considered in this model. Finite Element Analysis (FEA) was carried out and results were compared with the allowable limit.

Gear pair design optimization by Genetic Algorithm and FEA

Gearbox for wind turbine must be designed to have the sufficient structural strength to sustain the extreme torque and forces transferred from rotor blades. Traditionally, the structural analysis of gearbox has been made using the simplified FEM models in which the contacts between gear teeth are replaced with the equivalent forces acting on the gear shafts, because the consideration of the detailed internal gear transmission system requires a huge number of degrees of freedom. But, the traditional method can neither accurately reflect the gear transmission forces, nor is it preferable for the dynamic analysis. In order to solve these problems, a structural analysis method considering the tooth contact of internal gear system is introduced in this paper. The actual tooth contact between a pair of gears is modeled with spring elements and the spring constants are determined through the stiffness analysis of gear teeth. The current analysis technique is justified through the comparison with the simplified gear system model and applied to the structural analysis of a 2-stage differentialtype gearbox for wind turbine.

Finite element structural analysis of wind turbine gearbox considering tooth contact of internal gear system

Optimal mass minimization design of a two-stage coaxial helical speed reducer with Genetic Algorithms

Purpose - The finite element method (FEM) has become the prevalent technique used for analyzing physical phenomena in the field of structural, solid and fluid mechanics. The output of scientific pa ...

Finite element analyses and simulations of gears and gear drives - A bibliography 1997-2006

An integrated design system (IDS) approach has been developed to integrate various stages of the mechanical design process, including rapid prototyping. The system consist, of design, analysis, cal...

V. Ramamurti

Papers

Computer-aided design of a two-stage gearbox

Development of user-friendly programs for static and dynamic analysis of radial impellers

An efficient algorithm for solving spoked wheels

Automatic mesh generation in 2-D and 3-D objects