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*Line SECTION GROUPS |
 
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*Line SECTION GROUPS
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*Line SECTION GROUPS |
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To define groups of line sections which may be reused and repeated within sections defined in *LINES.
Refer to Modelling Repeating Sub-Sections for further information on this feature.
A block of lines defining a line section group and its associated sections. The entire block of lines defining the individual line section group may be repeated as often as necessary to define all the required line section groups in the model.
The first line defines a name for the line section group.
NAME=Line Section Group Name
A block of one to three lines defining a section. The first line defines a set name for elements within the section, and the length of the section. The optional second line defines an additional set or sets to which the elements within the sub-section are to be added. The optional third line defines suggested minimum and maximum element lengths for the sub-section to be used during mesh generation. This block may be repeated as often as necessary to define all the required sections in the group.
SECTION=Section Set Name, Length
[ADDITIONAL=Set Name, Set Name, Set Name etc.]
Minimum Element Length (at section start) [, Maximum Element Length] [Minimum Element Length (at section end)]
Input: |
Description |
Group Name: |
Line section group name. |
Section Set Name: |
The element set name for the line section definition. |
Length: |
Length of the section. |
Min. Element Length at Start: |
The minimum element length to be used in meshing the line section. The first element at the start of the line section will be assigned a length which is identical or very close to this value. |
Max. Element Length: |
The maximum element length to be used in meshing the line section. The lengths of successive elements beginning from the start of the line section are gradually increased up to this value. This entry is optional, and if omitted, a uniform mesh density is typically created, based on the specified Min. Element Length at Start. |
Min. Element Length at End: |
The minimum element length to be used in meshing the line section towards the end of its length. The last element at the end of the line section will be assigned a length which is identical or very close to this value. This entry is optional, and if omitted, it defaults to the Min. Element Length at Start entry for the next section. This allows the meshing algorithm to automatically blend sections into one another. |
Additional Sets for this Section: |
Additional set or sets to which the elements within the sub-section are to be added. This may be useful in combining different sections which have similar structural or hydrodynamic properties. If more than one set is referenced, use commas to separate out the set names. |
(a)Use as many rows as you need to completely define all the sections within a particular group. Simply leave Column 1 blank for the second and subsequent sections. For subsequent groups, put the Line Name in Column 1 and specify the line sections in the same way.
(b)It is important to define meaningful names (for Section Set Name entries, and any Additional Set names if applicable), as these names will be used by the program to automatically create relevant element sets for you, which you can subsequently reference when you are assigning structural and hydrodynamic properties to your model.
(c)Refer to Modelling Repeating Sub-Sections for further background information on the use of line section groups.
(d)Refer to Line Mesh Generation for a detailed discussion of the automatic mesh creation facility.