关键词: 涡轮盘, 优化设计, Kriging模型, 有限元方法

Abstract: Aero-engine turbine disc design problems were studied and an optimization design approach based on Kriging approximate models by combining Kriging method and a global constrained optimization algorithm was put forward, which significantly reduced the number of finite element analyses and computations. Initial sampling data were obtained with the orthogonal experiment design and finite element method. The Kriging model for calculating the approximate values of turbine disc weight and stresses was constructed by using existing design data, which was invoked iteratively by the global optimization algorithm during search for an approximate optimum through the design space. Subsequently, the approximate optimum as a result of search based on the Kriging model was analyzed using finite element method, and the computation outputs were utilized to update the design dataset so as to improve the accuracy of the Kriging model. Numerical computation demonstrated that the presented optimization design approach based on Kriging models could obtain satisfactory solutions while considerably decreased computation cost and increased design efficiency as well.

Key words: turbine disc, optimization design, Kriging model, finite element method