Mapped meshing method and mapped seeding method
Systems and methods for mesh generation for a model are disclosed. A mesh generation system may include a processing circuit configured to receive a surface geometry of a model, the surface geometry including more than one boundary node. The processing circuit is further configured to generate a finite element mesh of the model using the one or more boundary nodes of the surface geometry. The generation of the finite element mesh occurs via one of a mapped meshing method and a mapped seeding method. The mapped seeding method may be used when one or more fixed nodes are present in the model.
1. A mapped meshing method, comprising:
receiving a surface geometry of a model, the surface geometry including more than one boundary node, wherein the model is designed by a user using a Computer-Aided Engineering (CAE) system or a Computer-Aided Design (CAD) system;
determining boundary edges of the surface geometry;
determining curvature information of each boundary edge;
calculating a plurality of node locations on each boundary edge using the curvature information;
determining a mesh adjustment based on the boundary edges to adjust a position of each node location in the surface geometry;
generating a finite element mesh using the node locations; and
performing a CAE finite element analysis using the finite element mesh, wherein the CAE finite element analysis is performed by the CAE system.
2. The method of claim 1 , further comprising:
determining a failure to generate a finite element mesh based on angles between boundary edges of the surface geometry.
3. The method of claim 1 , wherein determining the curvature information for a boundary edge comprises:
comparing distance between edges of a surface convex hull of the boundary edge and distance between boundary nodes of the boundary edge; and
determining that the boundary edge is curved if a difference in distance is greater than a threshold value.
4. The method of claim 3 , further comprising:
determining that a curvature of a boundary edge is less than a given threshold; and
calculating the plurality of node locations on the boundary edge by using the slope of the boundary edge.
5. The method of claim 3 , further comprising:
calculating the plurality of node locations on the boundary edges via interpolation techniques.
6. The method of claim 1 , wherein determining the mesh adjustment based on the boundary edges comprises:
calculating a direction vector for each node location relative to a boundary of a convex hull of the boundary edges;
adjusting each node location based on the direction vector.
7. The method of claim 1 , wherein the finite element mesh is displayed to the user.
8. The method of claim 1 , wherein the finite element analysis is performed during a design process for the model.
9. A mapped seeding method, comprising:
receiving a surface geometry of a model, the surface geometry including more than one boundary node and at least one fixed node on the surface geometry that is not a boundary node, wherein the model is designed by a user using a Computer-Aided Engineering (CAE) system or a Computer-Aided Design (CAD) system;
determining boundary edges of the surface geometry;
determining a boundary edge pair comprising two boundary edges of the surface geometry;
determining fixed node locations on each boundary edge of the boundary edge pair;
generating a node list for each boundary edge of the boundary edge pair, wherein the node list comprises a list of boundary nodes and fixed nodes on the boundary edge;
mapping the nodes in the node list of a boundary edge of the boundary edge pair to the opposing boundary edge;
adding additional nodes to a boundary edge if a distance between two consecutive nodes in the node list is larger than a threshold value;
generating a finite element mesh using the node location of nodes in the node list; and
performing a CAE finite element analysis using the finite element mesh, wherein the CAE finite element analysis is performed by a CAE system.
10. The method of claim 9 , wherein adding additional nodes to a boundary edge comprises:
defining a segment of a boundary edge using two nodes from the node list of the boundary edge;
receiving a pre-defined distance;
determining that a length of the segment is larger than the pre-defined distance; and
adding a new node to the node list such that a segment including the new node and one of the other two nodes has a length equaling the pre-defined distance.
11. The method of claim 10 , wherein new nodes are added to the node list until each segment of each boundary edge has a length equal to or less than the pre-defined distance.
12. The method of claim 11 , wherein the pre-defined distance is a user-defined distance.
13. The method of claim 9 , wherein the surface geometry comprises more than one boundary edge pair;
wherein the method further includes identifying each boundary edge pair and adding additional nodes for each boundary edge of each boundary edge pair.
14. The method of claim 9 , wherein each boundary edge in the boundary edge pair include the same number of nodes in the node list.
15. A mesh generation system, comprising:
a memory; and
a processor configured to:
receive a surface geometry of a model, the surface geometry including more than one boundary node, wherein the model is designed by a user using a Computer-Aided Engineering (CAE) system or a Computer-Aided Design (CAD) system;
generate a finite element mesh of the model using the one or more boundary nodes of the surface geometry; and
perform a CAE finite element analysis using the finite element mesh, wherein the CAE finite element analysis is performed by a CAE system;
wherein the generation of the finite element mesh occurs via one of a mapped meshing method and a mapped seeding method.
16. The system of claim 15 , wherein the mapped meshing method comprises:
determining boundary edges of the surface geometry;
determining curvature information of each boundary edge;
calculating a plurality of node locations on each boundary edge using the curvature information;
determining a mesh adjustment based on the boundary edges to adjust a position of each node location in the surface geometry; and
generating a finite element mesh using the node locations.
17. The system of claim 16 , wherein determining the curvature information for a boundary edge comprises:
comparing the distance between edges of a surface convex hull of the boundary edge and the distance between boundary nodes of the boundary edge; and
determining that the boundary edge is curved if the difference in distance is greater than a threshold value.
18. The system of claim 16 , wherein determining the mesh adjustment based on the boundary edges comprises:
calculating a direction vector for each node location relative to the boundary of the convex hull of the boundary edges;
adjusting each node location based on the direction vector.
19. The system of claim 15 , wherein the surface geometry further comprises at least one fixed node on the surface geometry that is not a boundary node;
wherein the at least one fixed node is used in the mapped seeding method to generate the finite element mesh.
20. The system of claim 19 , wherein the mapped seeding method comprises:
determining boundary edges of the surface geometry
determining a boundary edge pair comprising two boundary edges of the surface geometry;
determining fixed node locations on each boundary edge of the boundary edge pair;
generating a node list for each boundary edge of the boundary edge pair, wherein the node list comprises a list of boundary nodes and fixed nodes on the boundary edge;
mapping the fixed nodes of a boundary edge of the boundary edge pair to the opposing boundary edge;
adding additional nodes to a boundary edge if a distance between two consecutive nodes in the node list is larger than a threshold value; and
generating a finite element mesh using the node location of nodes in the node list.
21. The system of claim 20 , wherein adding additional nodes to a boundary edge comprises:
defining a segment of a boundary edge using two nodes from the node list of the boundary edge;
receiving a pre-defined distance;
determining that a length of the segment is larger than the pre-defined distance; and
adding a new node to the node list such that a segment including the new node and one of the other two nodes has a length equaling the pre-defined distance.
22. The system of claim 21 , wherein new nodes are added to the node list until each segment of each boundary edge has a length equal to or less than the pre-defined distance.