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Guide 3 Mesh Construction and Modification
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Contents
Preface
List of Figures
1 Two-dimensional mesh generation
1.1 Introduction
1.2 Methodology
1.3 Main ideas
1.3.1 The NOPO data structure
1.3.2 Introduction of a curve
1.3.3 Modification of the numbers
1.3.4 Definition of the nodes
1.4 The module APNOPO
1.4.1 General presentation
1.4.2 APNOPO flowchart
1.4.3 Implementation
Calling, libraries and files
Keywords
1.4.4 A complete example
The data file:
1.4.5 Abbreviated list of the keywords
The EMC˛ preprocessor
1.5.1 General remarks
The CONSTRUCTION application
The PREP_MESH application
The EDIT_MESH application
A very simple detailed example
A less trivial example
1.5.2 The global menus
Selection menus
Shortcuts
Practical utilization
The calculator menu
The general menu
Exiting the program
Querying the database
Destructing elements of the database
Saving the database
Restoring the database
Resetting
Printing the screen
Redrawing the window on another graphic peripheral device
Executing a system command
Saving a run
Reexecuting a run
Moving to the CONSTRUCTION application
Moving to the PREP_MESH application
Moving to the EDIT_MESH application
The screen management menu
Enlarging the display
Reducing the display
Translating the graphic window
Defining a scale
Redrawing the graphic window
Centering the display
Redrawing the previous display
Redrawing the next display
Drawing the whole display
1.5.3 The construction application
Presentation
Utilization
Meta-syntax of description of the operations
Modification of the state of the system
Construction of points
Construction of straight lines
Construction of circles
Construction of arcs
Construction of segments
Construction of splines
Geometrical transformations
Rounding off angles
Defining a contour
Reversing segments or arcs
Complementing arcs
Inverting elements
Cutting one element with another?
Changing part of an element
Adding elements
Merging two elements
The PREP_MESH application
Presentation
Utilization
Modification of the state of the system
Definition of intermediate points
Definition of the ratio
Definition of the reference number of extremities
Definition of the line reference number
Cracking lines
Uncracking lines
Definition of a subdomain reference number
Defining a domain
Adding interior elements to a domain
Verification of the correct definition of a domain
Removing elements from a domain
Meshing mode of a domain
Partition mode for a quadrangular domain
Visualization of domains or components
Generating an APNOXX input file
The EDIT_MESH application
Presentation
General remarks
Definition of the state variables of the application
Editing the mesh
Moving a vertex
Adding a vertex to the mesh
Suppressing a vertex to the mesh
Reversing an edge of the mesh
Delaunay mesh
Regularizing the mesh
Triangulating
Quadrangulating
Cracking
Modifying the mesh references
Renumbering vertices
The transformations
Translation
Symmetry
Rotation
Homothety
Effectively generating the transformations
An example of transformation
1.5.6 Example
The unit square with a hole
Construction of the unit square with a hole
Definition of the boundary discretization
Generating and saving the mesh
A NACA0012 wing
Introduction
Constructing the geometry
Discretization of the contours
Generating and editing the mesh
1.5.7 Limitations and bugs
1.5.8 Internal data structure
Description of the DB for the CONSTRUCTION application
Description of the DB for the PREP MESH application
Description of the list of elements passing through point i
Description of the list of components
Description of the list of domains
Description of the DB for the EDIT_MESH application
Description of AM, AM_FMT, AMDBA meshes
AM files
AM_FMT files
AMDBA files
1.5.9 Index
Index
2 Three-dimensional mesh generation (1)
2.1 Introduction
2.2 Methodology
2.3 Main ideas
2.3.1 The NOPO data structure
2.3.2 Modification of the numbers
2.3.3 Definition of the nodes
2.4 General presentation of module APNOP3
2.5 APNOP3 flowchart
2.6 Implementation of module APNOP3
2.6.1 Calling, libraries and files
2.6.2 Keywords
2.7 A complete example
2.8 Abbreviated list of the keywords
3 Three-dimensional mesh generation (2)
3.1 Introduction
3.2 Multi-block method
3.2.1 Quick description of the method
3.2.2 Calling of module COLIB2
3.2.3 Calling of the derived modules
COLIBT: tetrahedral case
COLIBP: pentahedral case
COLIBH: hexahedral case
3.2.4 Module COLIBR
3.2.5 Preprocessor COLIXX
3.2.6 Some utilization examples
3.3 Extrusion method (cylindrical topology)
3.3.1 Quick description of the method
3.3.2 Simplified version
3.3.3 Data definition
Construction of the sections
Construction of the layers
Options
The physical attributes
3.3.4 Calling of module MA2D3E
3.3.5 The preprocessor MA23XX
3.3.6 Examples of use
3.4 Method for a hexahedral topology
3.4.1 Quick description of the method
3.4.2 Description of the input data
3.4.3 Calling of module GEL3D1
Description of the data
Calling the module
3.4.4 Examples of use
4 List of the modules
4.1 Introduction
4.2 Mesh generation modules
4.3 Mesh modification modules
5 Tutorial examples
5.1 Introduction
5.2 A two-dimensional example
5.2.1 Top-down analysis
5.2.2 Bottom-up construction
5.3 A three-dimensional example
5.3.1 Top-down analysis and mesh of the starting section
5.3.2 Construction of a three-dimensional mesh
References
Next:
List of Figures
Up:
Guide 3 Mesh Construction and Modification
Prev:
Preface
Index