Most of the cost of the ship is committed in the early design stages, where the fast propagation of design changes and the highest precision are required.
FORAN Initial Design comprises the Hull Forms, General Arrangement and Naval Architecture calculations, all integrated with the other design disciplines in the FORAN database, which ensures data integrity, fast propagation of changes, multi-user access and the reuse of information in later stages.
FORAN can define any type of hull forms from scratch, or can import third-party forms. It performs transformations and manages the lofting and fairing. The topological model based on references allows the fast generation of decks and bulkheads.
The general arrangement is performed in 3D. The definition of spaces is simple, as it is based on references to the model. The tool allows the insertion of attributes, such as the contents of tanks, and automatically calculates volumes, weights, centers of gravity and moments of inertia. Finally, the main equipment may be positioned in the model. As an output, tailored general arrangement drawings are generated automatically and can be updated after changes.
The new naval architecture solution groups all of the functionalities, including hydrostatics, longitudinal strength, loading conditions, intact and damage stability, including deterministic and probabilistic methods, power calculation and launching. The user-friendly and interactive interface and the more powerful capability gives more added value at this important stage, in addition to checking results against the most modern international criteria.
FORAN Initial Design Benefits:
- Solution integrated with the rest of FORAN design disciplines (Oracle database) or in a standalone format (SQLite database).
- The possibility to perform concurrent engineering ensures data integrity.
- The topology and the automation of tasks accelerates the model definition, the study of different design alternatives and the propagation of changes.
- Advanced capability for the management of hull forms.
- Highly innovative 3D general arrangement, avoiding errors and inconsistencies.
- Powerful calculation and user friendly interface for the naval architecture solution with continuous update of regulations.
Hull forms definition
FORAN provides advanced tools to define the ship surface model based on NURBS formulation:
- Conventional or special hull forms such as mono-hulls, non-symmetric vessels, multi-hulls and oil rigs.
- By means of interactive graphic functions, lofting facilities and surface curvature and smoothness controls, the designer can evaluate diverse design alternatives easily and rapidly.
- Quadratic transformations of the ship FORAN imports/exports surfaces from/to other standard formats (IGES, DXF, STEP… ), and also from/to proprietary third-party formats.
FORAN offers a comprehensive environment for the definition of deck and bulkhead surfaces of the ship, using interactive graphic commands with a simple parametric definition. Hulls, decks and bulkheads are associated topologically, so design modifications are automatically propagated to all related elements. Asymmetric or symmetric decks, with any type of sheer and camber, discontinuities, knuckles and steps are defined in a smart and efficient way, and their intersection with the hull surface is automatically calculated. In addition, it is possible to generate any type of flat or corrugated bulkhead.
The definition of the ship’s general arrangement (GA) is innovative and is done in 3D. The module offers several options for generating spaces, including useful 2D views connected to the 3D model. Any ship compartment can be subdivided into subspaces, which can be created selecting the boundary surfaces, defining several sections or parametrically. The topological definition of all these elements, based on references, ensures that any modification to their limits is automatically applied to the compartment geometry.
The insertion of data related to the contents of the tanks and associated attributes allow the calculation of relevant information that will be used later in the analysis, such as weights, cogs and volumes.
Additionally, it is possible to position all of the equipment that has already been defined in the database or interactively defined in the 3D model. This applies not only to machinery and equipment, but also to deck equipment, weapons or accommodation elements.
GA drawings are generated directly from the 3D model and are linked to it so any modification in the 3D model will generate updated drawings.
A 2D graphic editor in the FORAN drafting tool includes a complete set of functions, plus the possibility of adding smart dimensioning, symbols, standard components, configurable drawing templates and labels, and also generate parts lists from the drawing information.
A new application in FORAN groups all the naval architecture capabilities in a single tool with a user-friendly interface, interactive tasks and powerful calculation processes, with all data hierarchically organized. The process starts by defining the information necessary for the calculations, such as the watertight characteristics, appendages, draught marks, openings, wave and wind profiles, sounding lines and modular cargo.
FORAN features the complete calculation of hydrostatic values (Bonjean curves, Deadweight scale, Stability cross curves, Freeboard, Floodable and permissible lengths, Sectional areas or Trim diagrams).
All calculations are made in accordance with the latest national and international conventions, regulations, rules and resolutions, which are continuously updated in FORAN. Even users can define their own criteria.
FORAN enables an accurate calculation of the flooding conditions and damage stability according to the deterministic and probabilistic methods, taking into account the intact stability conditions, and associates the spaces to the geometric subdivision defined.
Complete dynamic calculations and analysis of ship launching over slipway and floating from dry dock processes are featured in FORAN, including graphic representation and static and dynamic stability calculations.
FORAN also estimates towing resistance using a number of modern powering prediction methods, including some warship-specific ones, and with several possibilities for propeller selection and analysis. The outputs are the main features of the propeller, power-speed curves, forecasted service and trial conditions (including trawl condition in trawler ships) and open-water propeller diagrams. Propeller geometry can also be calculated according to the requirements of classification societies.
FORAN allows the interactive design of the basic particulars of the rudder and the schematic ship stern profile, and an estimate of the maneuverability characteristics.