AVEVA Initial Design 12.0For contract and structural design with naval architectural calculations and cost estimates

AVEVA Initial Design is an integrated suite of advanced, yet cost-effective andpractical ship-design tools developed for naval architects and design engineers. Theapplication is best used as the front end of the complete, integrated AVEVA Marinesolution, but it can also be used on its own for the conceptual parts of the design.

Initial Design is a tool for rapid definition and analysis during the contract and thestructural design phases of a project. Its close integration with other AVEVA Marineapplications ensures smooth and rapid design development on projects taken into basicand detailed design.

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Arrangement study for a RoPax vessel

Business Benefits• Rapid concept development.

Advanced mathematicalmodelling and analysistechniques including fullsurface topology enable quickdesign evaluation.

• Flexible application capableof configuration to suitcustomer needs; means thatusers can work in the mostefficient way that suits them.

• Graphical user interface thatprovides an intuitive way ofworking that helps achievehigh productivity quickly.

• Fully integrated with hull andoutfitting design, reduceserror and the need to re-create data.

MARINE

GeometryLines is a hull fairing tool whichcan be used to create virtually anyform of marine vehicle, includingmulti-hulls, chined andasymmetrical hulls. The hull formis initially represented as aloosely-connected mesh of curvesthat is used to semi-automaticallycreate a surface comprised of B-spline patches and bounded planeswith tangential (C1) continuity.

Advanced mathematicaltechniques are incorporated forautomatic curve fairing andsurface smoothing. The quality ofthe surface can be assessed usingisophotes to visualise fairness andcontinuity.

Display of hull surface using isophotes

Features include:

• Primitive creation – plane,block, pyramid, cylinder, cone,sphere, toroids.

• Curved surfaces creation –swept, extruded, rotated,skinned surfaces, 3 or 4boundary interpolatedpatches, tube.

• Curve primitives – polylines,splines, lines, arc, ellipse,NACA sections.

Compartment facilitates the quick definition of transverse andlongitudinal bulkheads, decks, compartments and superstructure.

All features are stored topologically and can be rapidly regenerated toaccommodate design changes with minimum effort. Functionaldescriptions can be assigned to bulkheads and decks, to enableautomatic generation of steel in Hull Structural Design.

Analysis tools are incorporated for calculation of mass properties withfacilities for preliminary weight analysis. Compartment also providesautomatic generation of container bays.

Features include:

• Interactive point and curveediting.

• Traditional 2D or advanced 3Dfairing.

• Automatic curve fairing anddata reduction.

• Special handling of waterlineendings and frame feet.

• Hull form hydrostatics.

Lines can be used for rapid hull form creation in preliminary design, orfor full production fairing.

• Sectional area curvedistortions and scaling.

• Deck creation with gunwaledefinition.

• Lines plans and loftbooks.

• Surface generation withautomatic smoothing andmanual editing.

• Assessment of surfacefairness.

Surface is principally used to model features of the main hull and itsappendages, such as rudders, anchor pockets and thruster tunnels.

At its core is a 3D solid modelling kernel that can be used to create manyadditional ship features. Its rich functionality can be equally applied toship superstructures or offshore structures.

• Surface operations – subtract,unite, solid intersection,intersect, imprint, join,combine, blend, scale, move,rotate, align, reflect, copy,concatenate, control pointediting.

• 2D operations – join, trim,cross, offset, fillet.

• Visualisation – principalcurvature, curvature tufts,Gaussian, isophotes,transparency, lights.

• Lines plans and loftbooks.

Modelling of hull curves

Features include:

• Creation of transverse andlongitudinal bulkheads, decksand compartments withtopological referencing.

• Non-planar bulkhead/deckoptions including cranked,corrugated, upper and lowerstools.

• Creation of compartmentsfrom bulkhead, deck and hullform boundaries, or frommerging of compartments byaddition and subtraction.

• Creation of internal structuresfrom operations (subtraction,intersection, etc.) on primitives(plane, block, pyramid, cylinder,cone, sphere, toroids).

• Calculation of mass properties –volume, surface area, LCG, TCG,VCG.

• Preliminary weights and centresof gravity analysis.

• Automatic container bayarrangements.

• Integration of internal surfaces(transverses, longitudinals anddecks) throughout AVEVA Marinefor early structural steel designand full topological modelling.

Geometry (continued)

HydrostaticsThe Hydrostatics module providesa comprehensive toolkit of navalarchitectural assessment routines,including the calculation ofhydrostatics, tank calibrations,trim tables, loading conditions,loading and dischargingsequences, intact and damagestability, critical KGs, longitudinalstrength, inclining experiment,freeboard, floodable length,tonnage and launching.

Particularly sophisticated routinesare included for damage stabilityassessment, using bothdeterministic and probabilisticmethodology, as well as morespecialised calculations coveringgrain stability, water on deck, andso on. The latest SOLASprobabilistic stability regulationsfor both passenger and cargo shipsare incorporated.

Comprehensive graphical andtabular output is availablethroughout, in a form directlyapplicable to obtaining bothowner and regulatory approval for

a new design, and for use instandard documentation such astender responses, stabilitybooklets and damage stabilityassessments.

A significant feature of theanalysis module is that the overallprocess is, itself, report formatoriented. Reports can also beexported in HTML or XML format toenable further customisation bythe user.

Features include:

• General particulars.

• Tankplan and loading diagram.

• Definition of openings, strengthlimits, etc.

• Lightweight definition.

• Container arrangement.

• Visibility check.

• Tank calibrations.

• Grain calibrations andpermissible grain moments.

• Hydrostatics, cross curves,sectional area curves anddeadweight scale.

• Trim tables.

• Intact and damaged stabilitywith critical KGs.

• Probabilistic stabilityassessment according to SOLAS old and new regulations.

• Continuous flooding simulation.

• Loading conditions with stabilityand longitudinal strength.

• Tonnage measurement,freeboard, floodable length andequipment number.

• Static and dynamic launchingcalculations.

• Inclining experiment analysis.

HydrodynamicsThe Hydrodynamics module consists of a wide range of analysis tools forthe prediction of the hydrodynamic performance of vessels.

Powering

A range of methods based on widely-employed standard regressionanalysis methods can be used to estimate powering for single- and twin-screw vessels. Actual resistance results from towing tank experiments canbe substituted for the empirical estimates.

Features include:

• Propeller optimisation.

• Resistance calculations.

• Ship powering characteristics.

• Use of resistance ratios frommodel tests.

A loading condition report

Seakeeping

Seakeeping is analysed using standard strip theory. Added mass anddamping coefficients are calculated and combined with wave excitationforces to calculate the vessel's responses in regular and irregular seas.Responses at any location along the vessel may be calculated andcombined to provide subjective motions, deck wetness, propelleremergence and slamming. Short-term irregular response can be extendedto long-term performance prediction when combined with seakeepingcriteria and wave statistics provided by third parties.

Features include:

• Sectional hydrodynamiccoefficients.

• Regular wave responses (RAOs)

• Added resistance due to wavesand dynamic loads.

• Short-term, irregular vesselresponses (RMSs).

• Long-term seakeepingperformance predictions.

Manoeuvring

The manoeuvring characteristics of ships in deep or shallow water, undereven keel or trimmed conditions, can be assessed. This analysis canrapidly estimate the effect of changes in ship conditions, and takes intoaccount nonlinear coupling effects of hull forces and moments developedby the rudder.

Features include:

• Crash stop calculation.

• Zig-zag manoeuvre.

• Turning manoeuvre.

• Reverse spiral calculation.

Dynamic Positioning

The Dynamic Positioning module makes it possible to design the thrustersystem of any vessel which requires a station-keeping capability withthree or more thrust units.

Features include:

• Thruster requirements for agiven environment.

• Environment calculation,including a rosette of holdingcapability.

• Environmental RegularityNumber (ERN) calculation.

AVEVA Group plcHigh Cross Madingley Road Cambridge CB3 0HB UK Tel +44 (0)1223 556655 Fax +44 (0)1223 556666www.aveva.com

MARINE

AVEVA Hull Structural Design

AVEVA Hull Structural Design islicensed separately from InitialDesign. Hull Structural Design isused for the preliminary geometrydefinition and arrangement of theprincipal structural members of avessel, and provides the frameworkfor associated design guidance.Hull Structural Design is used forthe production of classificationdrawings, steel material estimates,weld lengths and weights andcentres of gravity reports.

Hull Structural Design supportsXML-based interfaces toclassification societies’ softwarepackages for rules checking andstructural analysis. General FEM-based strength analysis softwarepackages are also supported bythese interfaces.

Summary of Process Coverage

The table shows the moduleswithin Initial Design and theirpurpose within the process.

Although it is a separate product,Hull Structural Design is alsoshown in the table, in order toprovide a complete picture of theearly design activities covered bythe AVEVA Marine solution.

Process Geometry Hydrostatics Hydrodynamics Hull Structural Design

Contract Design

Hull form design �

Compartments and internal geometry �

General arrangement, tank plan, loading diagram � � �

Major appendage creation �

Speed and power prediction �

Hydrostatics, stability and section area curves �

Trim tables �

Damage stability �

Continuous flooding simulation �

Loading conditions and intact stability studies �

Longitudinal strength �

Weight estimation � �

Tank calibration and capacity tables �

Grain calibration and permissible grain moments �

Container bay arrangement and loading � �

Drawings and documentation � �

Generic export (DXF, IGES, SAT) for CAD systems � �

Structural Design

Structural design for classification � �

Cost-related information, including weight, bill ofmaterials, welding lengths and painting area �

Production planning � �

Generation of drawings � �

Generic export to analysis systems �

Generic export of DXF for general CAD systems �

Statutory compliance

Intact and damage stability evaluation for all existingregulations �

Generation of limiting GM/KG curves �

IACS longitudinal strength �

Shear force corrections �

Inclining test �

Grain stability �

Freeboard, tonnage and floodable length �

Report generation • Trim and stability booklet • Damage stability booklet

�

Performance

Power prediction �

Seakeeping analysis �

Manoeuvring �

Dynamic positioning �

AVEVA believes the information in this publication is correct as of its publication date. As part of continued product development, such information is subject to change without prior notice and is related to the currentsoftware release. AVEVA is not responsible for any inadvertent errors. All product names mentioned are the trademarks of their respective holders.

© Copyright 2007 AVEVA Group plc. All rights reserved. ID/DS/07