Application of nonlinear programming to the design for iron core of transformer

Based on the characteristic of the fabrication of the iron, when the caliber of the outside circumference of the iron was 650 mm, a nonlinear programming model was builded. The model was carried out by Lingo, the optimization design method on the iron of transformer was given out. When the design of dissipation for hot oil pipeline was added, the mathematical model was changed to the model of two mark and nonlinear mixed integer programming. The better optimization design method can also be given out.