caa a22 4500 475822978 CHVBK 20180406123823.0 cr unu---uuuuu 170329e20001201xx s 000 0 eng 10.1007/PL00013713 doi (NATIONALLICENCE)springer-10.1007/PL00013713 Informationally-Complete Product Models of Complex Arrangements for Simulation-Based Engineering: Modelling Design Constraints using Virtual Solids [Elektronische Daten] [N. Sapidis, G. Theodosiou] Complex mechanical arrangements involve a large number of constraints referring to either properties of individual components (of the arrangement) or relationships between components. Current practices approximate these constraints with simplified ‘dimensional constraints' aiming at formulating a system of (in)equalities to be solved automatically by a ‘geometric constraint solver'. This paper identifies limitations in this approach, leading to inaccurate descriptions of problems that disallow development of a collaborative engineering environment. Our work focuses on complex plants and their conformity with operational constraints for performing, e.g. maintenance, repair and emergency operations. Current Virtual Reality techniques cannot solve this problem as, at best, they only significantly enhance visual perception of 3D plant models. A detailed analysis of required ‘free-spaces' is presented on the basis of industrial data. The concept of ‘virtual solid' is proposed for modeling free-spaces and related geometric modelling techniques are derived. An ‘extended product model' is presented, also accommodating nongeometric properties of free-spaces, and thus leading to informationally-complete descriptions of plant-layout problems. Finally, an implementation in the AutoCAD environment is presented accompanied by realistic examples. Springer-Verlag London Limited, 2000 Keywords:Design validation nationallicence Free-space modelling nationallicence Plant layout nationallicence Virtual reality nationallicence Sapidis N. Ship Design Laboratory, Department of Naval Architecture and Marine Engineering, National Technical University of Athens, Athens, Greece, Greece aut Theodosiou G. Ship Design Laboratory, Department of Naval Architecture and Marine Engineering, National Technical University of Athens, Athens, Greece, Greece aut Engineering with Computers Springer-Verlag 16/3-4(2000-12-01), 147-161 0177-0667 16:3-4<147 2000 16 366 https://doi.org/10.1007/PL00013713 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/PL00013713 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Sapidis N. Ship Design Laboratory, Department of Naval Architecture and Marine Engineering, National Technical University of Athens, Athens, Greece, Greece aut NATIONALLICENCE 700 1- Theodosiou G. Ship Design Laboratory, Department of Naval Architecture and Marine Engineering, National Technical University of Athens, Athens, Greece, Greece aut NATIONALLICENCE 773 0- Engineering with Computers Springer-Verlag 16/3-4(2000-12-01), 147-161 0177-0667 16:3-4<147 2000 16 366 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer