Component File

The name of a component file can optionally be specified as input to ugform (see Utility Code Reference), on Line 11 of the parameter input list. If no component file is available, the entry none on Line 11 will cause ugform to automatically create a single component and a single body for the entire grid. To specify various components and bodies on the grid, a component file is created by the user the name of which is specified on Line 11 of the ugform input list. A sample component file is shown below. Components are specified as groups of surface patches, and bodies are specified as groups of components. Each component/body must be assigned a name, and all patches/components must belong to only one component/body.

Components are listed first, this is done in lines 1, through 30 in the component file. Line 6 denotes the number of components. The names of these components are listed consecutively beginning on line 8.
The patches which constitute each component are then listed beginning on line 15 (in this example), with possible exceptions beginning on line 26 (for this example). Each definition line contains the component number, and a beginning and ending patch number. All patches between these two values are assigned to that component. Patches can be listed multiple times in this assignment. Their component assignment is overwritten with the latest assignment value when they are specified multiple times. The EXCEPTIONS specification also overwrites the component numbers for particular patches. This portion of the file can be deleted (i.e. Lines 23 - 30 inclusively) if no exceptional patches are listed.
The specification of bodies begins on Line 35. This specification is similar to that of components except that bodies are composed of sets of components rather than patches. The number and range of the components must of course be consistent with that specified in the first portion of the component file.

SAMPLE COMPONENT DEFINITION FILE
============================================
GROUPING OF PATCHES INTO COMPONENTS
============================================
NUMBER OF COMPONENTS
4.
ICOMP COMP_NAME
1. FUSELAGE
2. WING
3. SYMMETRY_PLANE
4. OUTER_BOUNDARY
--------------------------------------------
COMPONENT DEFINITIONS
COMPONENT BEG_PATCH END_PATCH
1. 1. 5.
1. 11. 12.
1. 14. 59.
2. 60. 87.
2. 95. 98.
2. 88. 94.
3. 13. 13.
4. 6. 10.
--------------------------------------------
EXCEPTIONS
COMPONENT PATCH
1. 60.
1. 67.
1. 74.
1. 81.
1. 88.
============================================
GROUPING OF COMPONENTS INTO BODIES
============================================
NBOD
2.
IBOD BOD_NAME
1. AIRPLANE
2. OUTER_BOUNDARY
--------------------------------------------
BODY DEFINITIONS
BODY BEG_COMP END_COMP
1. 1. 2.
2. 3. 4.
--------------------------------------------
EXCEPTIONS
BODY COMPONENT
1. 1.
1. 2.