关键词: 多学科设计优化+;协作优化+;流固耦合+;曲面拟合+

Abstract: A collaborative optimization(CO) method is proposed for fluid-solid multidisciplinary design optimization(MDO) problems,in which coupling data of interface projected in parametric space is fitted by Bi-cubic B-spline surfaces for transferring between the disciplinary models.The direct coupling of fluid-solid interface is replaced by consistent conditions of the parameters of the Bi-cubic B-spline surfaces,which fitted for each discipline and called load surfaces here.Then,these consistent conditions are integrated in the collaborative optimization system of the fluid-solid problems.An example of turbine blade optimization is provided and the results show: the load surfaces are capable of representing coupling data of interface;the consistent condition of the parameters of load surfaces can replace the direct coupling of interface;the proposed method can be used in fluid-solid coupling problems.

Key words: Multidisciplinary design optimization+;Collaborative optimization+;Fluid-solid coupling+;Surface fitting+