三次元可変形状トラスの可能な形態について

抄録

The variable geometry truss (VGT）is a component technology that can realize various frame shapes by expanding or contracting one member or all members of the truss frame. We are trying to observe attitude analysis of 3D-VGT by using non-linear finite element method. At that time, we think the structure in which any axial forces do not work. Supposing that a parabolic antenna is attached to the upper surface of the 3D-VGT, we consider a problem that the normal vector and center of gravity on the upper surface of the truss are brought to close to the prescribed direction and position. To solve these problems, we introduce a genetic algorithm. The objective functions of simple GA is the inner product of the target normal vector and the unit normal vector of upper triangle and distance to target center of gravity, and the former solution closer to 1 and the latter solution closer to 0 are determined as the optimal solution. When an optimal solution cannot be obtained for the target normal vector with a single-bay VGT, it is shown that slight adjustment is possible to make the structure a multi-stage.