| Summary: | 碩士 === 中州技術學院 === 工程技術研究所 === 92 === The main purpose of this research is to develop a more efficiency and affective method to reduce the weight (shape) of a machine part under boundary conditions. The function of this optimization problem is the weight of the machine part. The geometry limits and the largest stress allowed by the material are constraints.
Since it is difficult to develop the relationship between stress field and shape for a complex shape machine, the variables of the object function cannot be specified. Even to obtain the object function in mathematical form is difficult.
Instead of develop the mathematical object function of the shape optimization, we introduce the rule-base shape optimization. Applying reasonable rules (constraints) in each stress develop iteration (by FEA), cutting the lower stress elements to reduce the weight of the machine part. Finally the iterations stop when there is no FEA elements can be cut by the rules.
In this research, there are several cases (toque arm and connecting rod) to prove the rule-base shape optimization is easier and more effective than the traditional methods.
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