| 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 applies the nonlinear finite element analysis tool ANSYS/LS-DYNA to simulate the drop-mass impact test of an on-road bicycle frame. Permanent deformation of frame is regarded as the performance measure. To create the mathematical model between design variables and permanent deformation, the uniform design method is used to plan a set of experiments with multiple factors and multiple levels. Then, the frame in each experiment is analyzed by ANSYS/LS-DYNA to obtain the permanent deformation value. Next, the Kriging interpolation method is used to construct the surrogate model of permanent deformation based on the input and output data of experiments. The goal of optimization is to minimize the permanent deformation and the optimal solutions of design variables are solved by the downhill simplex method.
From results, after the optimization processes, the improvement of the permanent deformation of front fork is 10.29 %. From the sensitivity analysis, the fifth length of down tube has the largest sensitivity for the permanent deformation of front fork as the drop-mass impact test is applied.
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