| Summary: | 碩士 === 國立高雄第一科技大學 === 機械與自動化工程研究所 === 102 === This paper aims at solving the maximum principal stress of the on-road bicycle frame under the fatigue testing with the horizontal forces, vertical force and pedaling forces by ANSYS/Workbench software. The experimental design is used to plan a set of experiments with multiple factors of bike frame size by uniform design. The influences of the dimensions of the bike frame on the maximum principal stress are also investigated.
According to the results of the uniform design experiment, the improvements of the maximum principal stresses for three fatigue tests are presented.Next, the Kriging interpolation method is used to construct the surrogate model of maximum principal stress based on the input and output data of experiments.
The goal of optimization is to minimize the maximum principal stress of three fatigue tests and to minimize the frame mass. First, to compose the each target be a single objective function by compromise programming method. Next, to optimize the single objective function by GRG Nonlinear method.And the optimal solutions of design variables are solved by the GRG Nonlinear method.
From results, after the optimization processes, the improvement of the maximum principal stress of the horizontal forces is 26.29%, the vertical force is 11.13% and the pedaling forces is 8.03 %. the improvements of the maximum principal stresses for three fatigue tests are presented.
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