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*Auxiliary |
 
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*Auxiliary
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*Auxiliary |
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To specify the auxiliary elements which comprise an auxiliary body.
Refer to Auxiliary Bodies for further information on this feature.
Note also that the old auxiliary body keywords (*NODE,AUXILIARY, *ELEMENT,AUXILIARY, *AUXILIARY, *PANEL,AUXILIARY and *PANEL SECTIONS,AUXILIARY) keywords have effectively been superseded by the integrated vessel/body features which provide a range of standard vessel and subsea component profiles. Refer to *VESSEL,INTEGRATED and *BODY,INTEGRATED for further information.
A block of lines that define an auxiliary body repeated as often as necessary. The block of lines starts with a line defining the body name. It is followed by either of two types of line defining the auxiliary elements assigned to the body, which can be mixed and repeated as often as necessary.
Line defining the body name:
BODY=Vessel Name/Node Number
Two types of lines for defining auxiliary elements:
List of Elements
or
GEN=Start Element, End Element [, Element Increment]
The list of elements can contain up to 20 element numbers. Element Increment defaults to 1. Vessel Name/Node Number can be NONE if no motions are to be applied to the auxiliary body.
Input: |
Description |
Body: |
This entry allows you to associate the auxiliary body with a vessel (in which case you specify the vessel name) or a structural node (in which case you specify the node number). |
Elements: |
The auxiliary elements that comprise the auxiliary body. You enter these elements in the same manner in which you enter elements in the Element Sets – Define table, with the exception that you cannot define auxiliary bodies in terms of other auxiliary bodies. You can only enter element numbers. |
(a)This table allows you to group together auxiliary elements into named auxiliary bodies. You may also associate the auxiliary body with a vessel or a node of the finite element discretisation data. If this option is invoked, the auxiliary elements translate and rotate with the vessel/node during the course of an analysis or series of analyses (static and dynamic). When viewed in the dynamic display, the motions of the auxiliary body will be clearly visible.
(b)You do not need to explicitly assign all auxiliary elements to auxiliary bodies. An auxiliary element that is not assigned to a body remains stationary throughout all subsequent analysis phases. For example, you might want to visually check for interference between a riser or hose and a nominally fixed structure.