Isogeometric Method for Optimal Design ofShell StructuresA Novative and Effective ApproachSarah Julisson

Optimal Shape Design: state of the art & today’s challenges

The standard process Shell structures

Parameterizedshape (CAD)

Mesh

FEAOptimizer

Optimal solution

NOKOK

Standard method indesign departments

Setting-up difficultiesReturn to CADSurface parametersMesh quality

Need expertise

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Novative approach: Isogeometric method

Main objectivesMaximize the design space explorationSimplify the optimization processImprove simulations quality

Standard approach:CAD / Meshing software / Solver / Optimizer

Parameterizedshape (CAD)

Mesh

FEAOptimizer

Optimal solution

NOKOK

Isogeometric approach:both integrated and innovative

Parameterized shape

Update mechanicalequations

Isogeometric analysis

Optimizer(Gradient based)

Optimal solution

NOKOK

[de Nazelle et al. 2012] Renault / ECL[Heinrich et al. 2011] Inria

[Reali et al. 2007] University of Pavia[Hughes et al. 2005] University of Texas at Austin

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First Applications

Optimization criteria

MassStiffness

Vibro-acousticFatigue

BucklingMaterial optimization (eg. composite)

Standard materials: Thermal screen Composite materials: Suspension wishbone

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