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引入基于Kriging模型的近似技术,建立了一种三维涡轮叶片的多学科设计优化方法.系统介绍了Kriging近似模型,采用松散耦合方法考虑叶片各学科之间的耦合关系,在多学科耦合分析的基础上,采用多学科可行方法与基于Kriging模型的多学科优化方法分别进行了优化和比较.算例表明,同等条件下相对于前者,后者能够在精度无明显损失的情况下更快地收敛到最优解,使涡轮叶片的各项性能得到明显改善,证明该优化方法是可行有效的.
A Kriging model-based approximation technique is introduced to establish a multidisciplinary design optimization method for three-dimensional turbine blades. The Kriging approximation model is introduced systematically. The loose coupling method is used to consider the coupling relationship among various disciplines. Based on the multidisciplinary coupling analysis , The multidisciplinary and multidisciplinary optimization methods based on Kriging model are respectively optimized and compared.Examples show that the latter can converge more quickly to the former under the same conditions with no obvious loss of accuracy Optimal solution, the performance of the turbine blade has been significantly improved, proves that the optimization method is feasible and effective.