Dr Alain Bovis

Executive Director, DCNS Research

The Virtual Ship

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Naval ship program

Main characteristics� Total budget: 1 - 10 G€

� Number of units: 1 - 10

Features� Confidentiality

� Multi-disciplinary

� Inter-operability

� “Customer onboard”

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Driving factors:

� Infrastructures (dry dock, lifting systems, naval b ase,…)

� User’s policies (operational doctrine, staffing, ma intenance,…)

� Life cycle (50 years)

� Available Technologies

Constraints

� Military Standards

� Public purchase rules

� Export control

� Transfer of Technology

Naval ship program (cont’d)

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A town of 3 000 people living in complete autonomy for several m onthsOn the surface of two football playgrounds

Complexity

Technical complexity� 200 sub-systems, 100 000 equipments, 1 000 000 parts

� 300 km of electrical cables, 50 km of ventilation d ucts

Operational complexity

Nuclearpower plantMissile base

Aircraft maintenance

base

Jointoperational

centre

Airport andAir traffic

control

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Industrial Complexity

Engineering: 1 000 000 mhrs

Construction: 10 000 000 mhrs� Manufacturing

� Pre-assembly

� Onboard integration

� Harbour and Sea Acceptance tests

Supply chain� 60 to 80 % of a ship value out sourced

� 3 000 suppliers

� 100 trades

� Up to 1 800 workers onboard

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Development

Contract Design

Design Process

Feasibility

Definition

Validation

Concept Design

Contract

Detailed Design

Design Review Design Review

Contract reference

cost

Developmentreference

cost

Productionreference

cost100 %

BudgetAssessment

System knowledge

Ideal

Real

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Concept exploration

Concept Early Design

Interaction with customer and users(evolving needs and requests)

Need to explore many solutionsTime and Funding limited

Most of structuring decisions

Development and Production phaseRisks

Cost overrun and delayUnavailable Technology

Non-adapted manufacturing environmentNumerous variation requests

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Expanding System Knowledge

Developing knowledge through simulationCapturing expert knowledge

Assessing pros and cons of conceptsImplementing Optimisation Methods

Deploying Decision making aids

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Concept design R

equi

rem

ents

an

d co

nsta

ints

Analysis and benchmark with Existing designs

Hull design

Main systemsdimensions

General arrangement

Stability

Structural design

Performance simulation and evaluation

Con

cept

sel

ectio

n

Customer CommercialProposal

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The classical concept design loop

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Digital Design Loop: The Virtual Ship

Meta-modelNATO Architecture Framework

OptimizationStrategy

Multi-Objectives Analysis

Visualization

Technical RequestsRules & Standards

EnvironmentBudget

Technology

Technical RequestsRules & Standards

EnvironmentBudget

Technology

Ship ConceptCost Estimate

Technology Plan

Ship ConceptCost Estimate

Technology PlanModels

FunctionalPhysical(Digital

Mock Up)Behavioral Probabilistic

Des

ign

Spa

ce

Multi-PhysicsSimulation

EHCLS*

NDMS

Decoy launcher

DECOY'SLAUNCHERS

EHCLS*

ASRU

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The Virtual Ship: state of the art

Simulators extensively used for training or operational evaluation� Levels of accuracy and/or fidelity vary� Used in support to ship design for systems C² tuning� Flexibility of simulators to model different ship a rchitecture

Numerical simulation (CFD, CSD, acoustics, ….) avail able� Calculation speed challenge� Consistency of models (calculation mesh) to be inte grated in a single

workflow for global performance evaluation

Surrogate models� Integration of probabilistic or behavioral models i n surrogate models

Multi-criteria optimization� Strategies and algorithms to be developed for Big D ata, highly

multidimensional spaces� Develop the sensitivity analysis (robustness) � Develop interactive visualization for decision maki ng

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