抄録
The topology optimization method is one of the means for structural design problems. This method derives a unique stationary point (conventional solution) from the full design domain which means the maximum domain for the design problem. However, in a multimodal problem, there are some stationary points and the conventional solution from the full design domain is not always the optimal solution. Therefore, it means possible that the design domain different from the full design domain derives the optimal solution. In the past study, we compared the conventional solution to diverse solutions (emergent solutions) from the system for deriving diverse solutions. As a result, it was confirmed that the emergent solution has higher stiffness than the conventional one. In this paper, we compared the derivation process of the emergent solution to the one of the conventional solution. As a result, the concentration of the density distribution was identified as a cause of deriving the superior solution. Therefore, it was indicated that the solution from the part design domain has higher stiffness than the conventional solution in the topology optimization.
