In-depth | CAD/CAM
using a landing craſt as the reference design in which FORAN had been used. He concluded that putting the design data together with repair records, technical documents, and maintenance and operations records, provides a powerful tool allowing operational and maintenance processes to be optimised. It enables builders to offer additional service to owners and operators. Raúl Serrano, SENER discussed the
management of compartment design using the new FGA module being developed in FORAN. Producing the general arrangement (and associated compartment layouts) is a vital activity in early design and it is useful in all stages including operations and final disposal. 2D models can be produced from little initial information and can be modified quickly. 3D models need more data to create but can be integrated with calculation and analysis tools and data can be used in later design stages. Design changes can be made most easily in the early design stages. Te FORAN approach combines the advantages of both approaches using advanced modelling and visualisation techniques and integration with other modules. Juan Arrospide, talked about the Rio
Santiago Shipyard and its experience with FORAN. V10 was first used in the late 80s and V50 was introduced in 2004. Update to V60r3.0 was in 2008. V50 has been used in designing a 45tonne tug and refitting the Frigata Libertad. V60 is being used for a new 47,000dwt product carrier and a tug with 100tonne bollard pull. He illustrated the generation of macros for 3D modelling of bollards, light fittings and rudder. Applications of FORAN in Chinese ship
design were described by J. Song, from UFC. Te current popular ship soſtware in China is CATIA/CADDS5 for general purpose and AVEVA/FORAN for ship design. MAXSURF is used but only for form generation. FORAN was used on a 60m, 800tonnes, maritime patrol craſt (delivered 2010). Lines comparison between FORAN and MAXSURF was very good and minor differences in hydrostatics can be explained by differing simplifying assumptions. Stability comparisons were consistent. Module FHULL was used for shell, decks and internal structure. Overall he concluded that FORAN is suitable for the design process, helping to guarantee design quality and reducing man-hours by 30%. FORAN is now being used for the 3D
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design of two more projects and is likely to be used more widely. China would like to see an improved interface with AUTOCAD and support for Chinese characters. Y. Ananiev of the Severnoye Design
Bureau, St. Petersburg, described the set up of his company, founded in 1946, its facilities and commercial and naval ships designed including those for foreign countries. The CAD system used is CAD-VESSEL which has FORAN as its nucleus. It issues electronic documents and transfers design data for production. Tey now have a 3D modelling department, have recently developed conceptual designs of LNG-carriers and are now preparing a classification design for such a vessel, using mainly FORAN. Carlos Gonzalez, SENER, explained that a
new module, FNORM, is being introduced in FORAN V70 in place of NORM, with which it is fully compatible. FNORM has a new 2D kernel, an integrated general engineering design (GED) graphics editor and a user interface similar to other F modules. It feeds into FHULL and other modules. Amongst other improvements, the new module allows a hierarchical organisation of parametric standards with the user able to define intermediate levels to make easier the access from other environments (e.g. from auxiliary structures in FPIPE). The user friendly GED editor is fully integrated with the 2D graphical area. Messages help solve inconsistencies and interactive checking is provided by reprocessing with different variable values. Better identification is possible using 12 characters. Antonio Valderrama, SENER, described
new tools to facilitate the import/export functionality of FDEFIN. In early versions of FORAN outfitting data was transferred using ASCII files managed by OS windows. Tis was partly upgraded in V60 to XML files. V70 will have a new way of managing standards, affecting not just their definition and handling but their transfer as well. Two new top level commands will give full access to all import and export capabilities. Te six earlier lower level commands will still be available if needed. Transfer files are XML based. Improved information integrity is provided by two controls actively checking and, if needed, completing the transfer. Data now includes HVAC standard sections and ship particulars.
Sergey Kokovin outlined the experiences
of SMART Marine Ltd in using FORAN Electrical Design. SMART Marine is implementing FCABLE in “standalone mode”. Normally FCABLE would use data generated in other FORAN modules such as FHULL, FPIPE, etc. Having described how the data can be generated from other systems for input to FCABLE, the speaker concluded that the FORAN Electrical Subsystem can be used effectively in projects developed by means of a third CAD/CAM system. Tis enables a design bureau to work more efficiently using systems in which they have already invested. Rafael de Gongora outlined SENER’s
vision for V70 and beyond. Tere will be greater internationalisation and higher performance due to using 64bits and 4GB RAM. New generation replication used by ORACLE will reduce volume of data transfers with improvements in control and checking. A new 2D kernel will be compatible with AUTOCAD. Based on this kernel there is to be a new GA model, FGA, working in 2D/3D. Stability calculations will be able to handle intermediate stages of flooding. Te new FNORM will give improved hull structure modelling as described above. Other improvements include a new algorithm for curved plates; automatic generation of supports for sloping pipes; commercial HVAC cross sections available in calculations; importing/exporting of HVAC components; better management of penetrations; 3D models of equipment as external files; historical record of every cable modification. Beyond V70 SENER envisage a new
geometric approach for hull forms; keeping abreast of changes in regulations; links with FEM systems; improved 3D modelling; links to electrical calculation tools; more effective drawing generation. SENER will use advances in technology to provide a system that will enable better, faster, cheaper ships to be built. The conference was closed by Luis
Garcia who said we must be optimistic for the future in spite of the current global recession. Many use FORAN as their preferred system and SENER will continue to develop it to meet clients’ needs. He hoped the new V70 system would be launched in November 2010. NA
The Naval Architect July/August 2010
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