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The aim of this paper is to present an integrated procedure for the optimization of dimensions of an on-road bicycle frame under horizontal, vertical and pedaling fatigue test and stiffness simulation. The procedure is composed of uniform design of experiments, explicit dynamics finite element analysis, Kriging interpolation, compromise programming method. The experimental design is used to plan a set of experiments with multiple factors of bike frame size by uniform design. Then, the bicycle frame in each experiment is analyzed by ANSYS/Workbench to obtain the maximum stress and deformation value. Then, Kriging interpolation is applied to construct the surrogate model of permanent deformation, maximum stress and bicycle mass based on the input and output data of experiment simulations. In order to get minimize the mass, maximum stress and permanent deformation of bicycle frame at the same time. First, to compose the each target be a single objective function by compromise programming method with weighting factors. Then, the bicycle frame stiffness simulation and mass is used to find the best weighting factors. Finally, generalized reduced gradient algorithm combine GRG algorithm method applied to find the optimal solution of dimensions of bicycle frame under the goal of minimize the mass, maximum stress and permanent deformation. From result, after performing the optimization procedure presented in this paper, the improvement rate of the horizontal test of maximum von Mises stress is 2.12%, the vertical test of maximum von Mises stress is 6.73%, the pedal test of maximum von Mises stress is 1.97%, the stiffness of maximum deformation is 1.28%, the mass of bicycle is 3.81%. Generally, successful achieve multi object design of optimization and the lightweight and high strength design of the bicycle frame.
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