Modifying a finite element mesh
A computer-implemented method of modifying a finite element mesh. The method includes providing an original-input-orphan-mesh, selecting and extracting at least a part of the original-input-orphan-mesh as an orphan-element-patch-object, generating faces on the orphan-element-patch-object as a faces-on-mesh-object geometry, generating a new mesh patch element based on the faces-on-mesh-object-geometry and at least one changed meshing-parameter. The changed meshing-parameter is assigned to generate a new mesh patch element that is different to the corresponding original-input-orphan-mesh. The method further includes generating an amended orphan mesh by replacing the orphan-element-patch-object of the original-input-orphan-mesh by the new mesh patch element.
1. A computer-implemented method of modifying a finite element mesh, the method comprising:
providing an original-input-orphan-mesh comprising a collection of connected nodes and elements that is separated from a parent geometry on which the collection of connected nodes and elements were originally created;
selecting and extracting at least a part of the original-input-orphan-mesh as an orphan-element-patch-object;
generating faces on the orphan-element-patch-object as a faces-on-mesh-object-geometry;
generating a new mesh patch element based on the faces-on-mesh-object-geometry and at least one changed meshing-parameter, wherein the changed meshing-parameter is assigned to generate the new mesh patch element that is different to a corresponding original-input-orphan-mesh; and
generating an amended orphan mesh by replacing the orphan-element-patch-object of the original-input-orphan-mesh by the new mesh patch element.
2. The computer-implemented method of claim 1 , further comprising before providing the original-input-orphan-mesh:
providing a geometry model of a component,
generating an original mesh based on the geometry model; and
separating the original mesh from the geometry model as an original-input-orphan-mesh to be provided;
and further comprising after the step of generating an amended orphan mesh:
performing a finite element calculation by applying the amended orphan mesh generating at least one calculation result.
3. The computer-implemented method of claim 2 , further comprising after the step of performing the finite element calculation by applying the new mesh patch element:
post-processing the at least one calculation result.
4. The computer-implemented method of claim 3 , wherein after post-processing the at least one calculation result the method further comprises:
evaluating if a repetition of:
generating a new mesh patch element based on the faces-on-mesh-object-geometry and at least one changed meshing-parameter;
generating the amended orphan mesh by replacing the orphan-element-patch-object of the original-input-orphan-mesh by the new mesh patch element,
is required to obtain a better approximation to a design specification;
wherein after determining the repetition is required, repeating generating the new mesh patch element and generating the amended orphan mesh; and
generating the component based on the design specification.
5. The computer-implemented method of claim 1 , wherein before generating faces on the orphan-element-patch-object as a faces-on-mesh-object geometry, the method further comprises:
receiving boundary-frozen-element-edges comprising frozen nodes of the orphan-element-patch-object, wherein the frozen nodes are retained during the generating of a new mesh patch element such that no new nodes are created on these edges.
6. The computer-implemented method of claim 1 , wherein before generating faces on the orphan-element-patch-object as a faces-on-mesh-object geometry, the method further comprises:
receiving input-feature-element-edges that correspond to element edges of the original-input-orphan-mesh that are treated as spatially fixed during subsequent method steps.
7. The computer-implemented method of claim 6 , wherein receiving boundary-frozen-element-edges or receiving input-feature-element-edges includes:
providing boundary-frozen-element-edges or input-feature-element-edges by a user interface.
8. The computer-implemented method of claim 1 , wherein generating faces on the orphan-element-patch-object as a faces-on-mesh-object geometry further includes:
changing mesh-elements of the orphan-element-patch-object into smaller or larger mesh-elements forming a basis for generating faces on the orphan-element-patch-object as a faces-on-mesh-object geometry.
9. The computer-implemented method of claim 1 , wherein generating faces on the orphan-element-patch-object as a faces-on-mesh-object geometry comprises for identifying singularities of the faces-on-mesh-object geometry the following additional steps:
selecting an area from the faces-on-mesh-object geometry as a feature; assigning a respective criterium-score to the feature of the faces-on-mesh-object geometry for distinguishing between a first feature type and a second feature type selected from feature-types including flat plane, ridge, or corner;
calculating at least two respective algorithmic criterium scores applied to the feature;
determining a total score assigned to the feature as a weighted sum of the criterium scores; and
comparing the total score to a predefined score-threshold and assigning the first feature type to the feature in case the total score is below the threshold, otherwise assigning the second feature type.
10. A non-transitory computer implemented storage medium that stores machine-readable instructions executable by at least one processor for modifying a finite element mesh, the machine-readable instructions comprising:
providing an original-input-orphan-mesh comprising a collection of connected nodes and elements that is separated from a parent geometry on which the collection of connected nodes and elements were originally created;
selecting and extracting at least a part of the original-input-orphan-mesh as an orphan-element-patch-object;
generating faces on the orphan-element-patch-object as a faces-on-mesh-object geometry;
generating a new mesh patch element based on the faces-on-mesh-object-geometry and at least one changed meshing-parameter, wherein the changed meshing-parameter is assigned to generate the new mesh patch element that is different to a corresponding original-input-orphan-mesh; and
generating an amended orphan mesh by replacing the orphan-element-patch-object of the original-input-orphan-mesh by the new mesh patch element.
11. The non-transitory computer implemented storage medium of claim 10 , wherein the machine-readable instructions further comprise before providing the original-input-orphan-mesh:
providing a geometry model of a component,
generating an original mesh based on the geometry model; and
separating the original mesh from the geometry model as an original-input-orphan-mesh to be provided;
and further comprising after the step of generating an amended orphan mesh:
performing a finite element calculation by applying the amended orphan mesh generating at least one calculation result.
12. The non-transitory computer implemented storage medium of claim 11 , wherein the machine-readable instructions further comprise after the step of performing the finite element calculation by applying the new mesh patch element:
post-processing the at least one calculation result.
13. The non-transitory computer implemented storage medium of claim 12 , wherein after post-processing the at least one calculation result the instructions further comprise:
evaluating if a repetition of:
generating a new mesh patch element based on the faces-on-mesh-object-geometry and at least one changed meshing-parameter;
generating the amended orphan mesh by replacing the orphan-element-patch-object of the original-input-orphan-mesh by the new mesh patch element,
is required to obtain a better approximation to a design specification;
wherein after determining the repetition is required, repeating generating the new mesh patch element and generating the amended orphan mesh; and
generating the component based on the design specification.
14. The non-transitory computer implemented storage medium of claim 10 , wherein before generating faces on the orphan-element-patch-object as a faces-on-mesh-object geometry, the instructions further comprise:
receiving boundary-frozen-element-edges comprising frozen nodes of the orphan-element-patch-object, wherein the frozen nodes are retained during the generating of a new mesh patch element such that no new nodes are created on these edges.
15. The non-transitory computer implemented storage medium of claim 10 , wherein before generating faces on the orphan-element-patch-object as a faces-on-mesh-object geometry, the instructions further comprise:
receiving input-feature-element-edges that correspond to element edges of the original-input-orphan-mesh that are treated as spatially fixed during subsequent method steps.
16. The non-transitory computer implemented storage medium of claim 15 , wherein receiving boundary-frozen-element-edges or receiving input-feature-element-edges includes:
providing boundary-frozen-element-edges or input-feature-element-edges by a user interface.
17. The non-transitory computer implemented storage medium of claim 10 , wherein generating faces on the orphan-element-patch-object as a faces-on-mesh-object geometry further includes:
changing mesh-elements of the orphan-element-patch-object into smaller or larger mesh-elements forming a basis for generating faces on the orphan-element-patch-object as a faces-on-mesh-object geometry.
18. The non-transitory computer implemented storage medium of claim 10 , wherein generating faces on the orphan-element-patch-object as a faces-on-mesh-object geometry comprises for identifying singularities of the faces-on-mesh-object geometry the following additional instructions:
selecting an area from the faces-on-mesh-object geometry as a feature; assigning a respective criterium-score to the feature of the faces-on-mesh-object geometry for distinguishing between a first feature type and a second feature type selected from feature-types including flat plane, ridge, or corner;
calculating at least two respective algorithmic criterium scores applied to the feature;
determining a total score assigned to the feature as a weighted sum of the criterium scores; and
comparing the total score to a predefined score-threshold and assigning the first feature type to the feature in case the total score is below the threshold, otherwise assigning the second feature type.