Research Of Blisk Modeling And Tetrahedral Mesh Automatic Generation

Finite element method is an effective means in solving complex engineering problem.Finite element mesh generation method is a crucial step of finite element numerical simulation and it has a direct impact on the accuracy of follow-up analysis results.Blisk has been classified as a new aviation engine and rocket engine components significant improvements to achieve optimum design of its purpose, the targeted development of blisk's modeling and automatic mesh generation system,it would have a very important project value.In this thesis, based on the OpenCASCADE blisk modeling methods and automatic generation of tetrahedral mesh related technologies were studied and discussed, the main contents include:Research on OpenCASCADE modeling module,including data type,topology,model,data storage,and so on.According to the structural characteristics of blisk,completed blisk modeling based on the OpenCASCADE.BFS(Boundary Facet Subdivide) methods in Constraint-based Delaunay tetrahedral mesh generation,including restrictive conditions and standardized requirements, standardized algorithm. Introduced the idea of BFS method, the algorithm and the efficiency analysis method.Using C++ and OpenCASCADE realized constraint delaunay tetrahedral mesh generation algorithm.Discussed the tetrahedral mesh quality standards,using C++ binding OpenCASCAD and TCL/TK achivethe blisk modeling and constraint delaunay tetrahedral mesh generation, and gives examples.