Simulation-based parameter optimizing method for precise casting process of single crystal turbine blade

The invention discloses a simulation-based parameter optimizing method for a precise casting process of a single crystal turbine blade. According to the simulation-based parameter optimizing method, the technical problem of poor optimization effect of the precise casting process of the single crystal turbine blade is solved. The technical scheme provided by the invention is that the simulation-based parameter optimizing method comprises the following steps of: designing a casting system model of the single crystal turbine blade; carrying out unit division on the casting system model by adopting a finite element analysis method; obtaining a precise casting process parameter and a reasonable parameter change range which have greater influence on the dimensional precision of a precise casting blade molded surface by extracting and identifying precise casting process parameters through a single factor process test; carrying out numerical simulation on the casting process according to the established test table; estimating the deformation condition of a casting relative to the designed model by processing and analyzing the data; and gradually narrowing the search range of the parameter optimization of the precise casting process by establishing a BP (Back propagation) neural network model and adopting a small-step searching method. The optimization effect of the parameter optimization method for the precise casting process of the single crystal turbine blade is improved.