PDMS to Tribon modeling comparison
CAD/CAM 2011/10/16 21:15
The scope of this document is a simplified model comparison based on PDMS Structural Design and TRIBON Hull Design.
The purpose of this document is to give an overview of two 3D- modeling systems and underline the differences between them.
PDMS provides powerful interactive functions, for example, Lists for model manipulation, whereas Tribon still heavily relies on manipulating of the schemes and batch modeling.
|Concept||Hierarchy (picture 1)||Panel (scheme)|
|Topology||Reference to element (picture 2) (Pline/Ppoint/Snode/Sjoint)||Reference to name (Sur/Pln/Pan/Pan Part/Pnt)|
|Coordinate System||Absolute (X/Y/Z)||Relative (FR/LP/LP)|
|Standards||Catalogue Database||Standards Database|
|Positioning||Pline/Ppoint > Justification||Mould line > Material side|
|Editing||Element (command window)||Panel (scheme)|
|Model Updates||Align Snodes (picture 3)||Recreate panel (scheme)|
|Model Checks||Lists & Reports||Panels (schemes) & Utilities|
|View Types||3D- view||2D- & 3D- views|
|Build Strategy||Hierarchy within Design application||WOP (separate application)|
|End Connections||Snodes||End connection table|
|End Cuts||Sjoints||End cut table|
Table 1, Model Comparison
Picture 1, PDMS Structural Database Hierarchy
Picture 2, Plines for I-beam
Picture 3, Connection of sections
- Section 2 is connected to section 1.
- Justification (based on pline) is NA for section 1 and TOS for section 2.
- Position of section 2 is determined by justifications of sections 1 and 2,
see picture 2 above for possible justifications for I-beam.
- Snode (asterisk in picture 3) determines the end connection (length) for section 2 and is
based on pline rule when connecting sections.
- SJoint (arrow line in picture 3) has the connection reference (CREF) pointing to section 2
and determines the end cut, which in turn is based on specification reference (SPREF).
- Plines correspond topology points in Tribon in a sense of referring to an existing
profile, but elements modeled using plines do not get updated, but only initially positioned.
- For additional information, refer to “PDMS Terms”, “PDMS Query Commands”,
“PDMS Lists” or “PDMS Reports”.
Article written by Marko Ervonmaa