This paper describes the design scheme of the three-dimensional structures based on the concept of the cellular automata simulation. The structural optimization in the present method is performed according to the local rule. The penelty function is defined from two objective functions and the constraint condition. Minimization of the penalty function with respect to the design parameter leads to the local rule. The derved rule is applied to the design of the three-dimensional structure applied to a single load and the schemes to reduce the computational cost are discussed.
