| Summary: | 碩士 === 國立中正大學 === 機械工程所 === 94 === The thesis focuses on developing a design tool based on the topology optimization and crashworthiness design techniques. This tool integrates three modules, the finite element software ANSYS/LS-DYNA is used as the structural analysis tool, the optimization module based on differential evolution method and a topology module. For realization of this design tool, a simple truss that simulates part of the chassis under the engine compartment of a vehicle and a concentrated mass that conceptually represents a passenger were used in the analysis of vehicle crashworthiness. The objective is to determine the truss topology that minimizes the maximal acceleration of the concentrated mass during the collision period. Two different approaches in calculating the acceleration during the collision period, explicit and implicit, were investigated respectively in order to study the influences caused by the numerical damping on the final truss topology. Based on the same concept, in the second example, a shock absorber was designed to be installed in a notebook monitor in order to increase monitor shock resistance. The objective is to minimize the maximal panel stress with a shock absorber of a minimal weight. In both examples, the design tool based on the topology optimization and crashworthiness design techniques proves to be efficient and useful.
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