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*Source Type |
 
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*Source Type
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*Source Type |
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To indicate the type of data storage file you wish to use as input to the fatigue analysis.
Refer to Fatigue Analysis (Mode 1) for further information on this feature.
One line of data specifying the source type.
SOURCE=Source Type
Source Type can be TIMETRACE or DATABASE. This keyword is optional. If omitted, Source Type defaults to TIMETRACE.
Input: |
Description |
Source Type: |
The options are Timetrace (the default) or Database. See notes for further details on each of these options. |
(a)Fatigue analysis in Flexcom is typically based on a series of random sea dynamic analyses, representing the loading experienced by an offshore structure over the course of its lifetime. In this case, Flexcom reads time histories of axial force and bending moment from Timetrace or Database output files. Timetrace output remains the default storage medium as earlier versions of Flexcom specifically required this format. Nowadays you can store this data using the more widely used database output.
(b)For the highly specialised case of VIV induced fatigue of inner pipes in pipe-in-pipe systems, the computational procedure involves the construction of regular/periodic time histories of bending moment, derived from the results of a static analysis of a riser system deformed into a specific mode shape, which are then post-processed by LifeTime. In this case, you should select Timetrace. Refer to VIV Induced Fatigue of Pipe-in-Pipe Systems for further details.
(c)Regardless of which source type you are using, the names of the actual data files which are to be used as input to the fatigue simulation are defined via the *SEASTATE FILES keyword.