FENET THEMATIC NETWORKCOMPETITIVE AND SUSTAINABLE GROWTH(GROWTH) PROGRAMME

Industry Sector RTD Thematic Area DateMarine & Offshore 14-Nov-02

CATIA - ANSYS, Perhaps someday the twain shall meet.

Jack ReijmersNevesbu, The Hague, The Netherlands

SummaryNevesbu uses CATIA for design and ANSYS for structural analysis.Although from a commercial point of view data-exchange is no problem,the effort required by the engineer is beyond compare.

FENET THEMATIC NETWORKCOMPETITIVE AND SUSTAINABLE GROWTH(GROWTH) PROGRAMME

ANSYS

FE model ANSYS interface

ProfessionalBase

Enterprise

FEMAP

CATIA CATIA viewer

FENET THEMATIC NETWORKCOMPETITIVE AND SUSTAINABLE GROWTH(GROWTH) PROGRAMME

FEMAPProfessional

Intermediate conversion

IGES, STEP, AutoCAD, µStation

Repairing, stitching, polishing

ANSYS

CATIA STandard for the Exchange of Product model data

FENET THEMATIC NETWORKCOMPETITIVE AND SUSTAINABLE GROWTH(GROWTH) PROGRAMME

–Typical example with volume models

With acknowledgements to Structural Dynamics Research Corp.

FENET THEMATIC NETWORKCOMPETITIVE AND SUSTAINABLE GROWTH(GROWTH) PROGRAMME

XYZ

V: Main ViewG: Presentation#1

Typical example in naval architecture

FENET THEMATIC NETWORKCOMPETITIVE AND SUSTAINABLE GROWTH(GROWTH) PROGRAMME

Why modelling in Volumes ?

Torpedoroom Moray

FENET THEMATIC NETWORKCOMPETITIVE AND SUSTAINABLE GROWTH(GROWTH) PROGRAMME

Watertight bulkhead of the Moray submarine

FENET THEMATIC NETWORKCOMPETITIVE AND SUSTAINABLE GROWTH(GROWTH) PROGRAMME

Surface on a volume’s face

ExcentricityGap

FENET THEMATIC NETWORKCOMPETITIVE AND SUSTAINABLE GROWTH(GROWTH) PROGRAMME

Stitching required

FENET THEMATIC NETWORKCOMPETITIVE AND SUSTAINABLE GROWTH(GROWTH) PROGRAMME

Shell missing

Bulkhead missingAutogenerated

structure

Model with flaws. Repair required

FENET THEMATIC NETWORKCOMPETITIVE AND SUSTAINABLE GROWTH(GROWTH) PROGRAMME

Fairing Mast - Yard delivered as IGES-file With acknowledgements to Gerard Dijkstra & Partners

FENET THEMATIC NETWORKCOMPETITIVE AND SUSTAINABLE GROWTH(GROWTH) PROGRAMME

With acknowledgements to Gerard Dijkstra & PartnersDefault meshing in ANSYS

FENET THEMATIC NETWORKCOMPETITIVE AND SUSTAINABLE GROWTH(GROWTH) PROGRAMME

Model longitudinal - Webframe

CATIA delivers 26 solids

FENET THEMATIC NETWORKCOMPETITIVE AND SUSTAINABLE GROWTH(GROWTH) PROGRAMME

Bulb profile is not closed after stitching in FEMAP

FENET THEMATIC NETWORKCOMPETITIVE AND SUSTAINABLE GROWTH(GROWTH) PROGRAMME

CATIA > µSTATION with stitching > FEMAP goes well

FENET THEMATIC NETWORKCOMPETITIVE AND SUSTAINABLE GROWTH(GROWTH) PROGRAMME

Generation of midsurfaces produces unwanted areas

FENET THEMATIC NETWORKCOMPETITIVE AND SUSTAINABLE GROWTH(GROWTH) PROGRAMME

Presence of lugplate disturbs the process

FENET THEMATIC NETWORKCOMPETITIVE AND SUSTAINABLE GROWTH(GROWTH) PROGRAMME

Cleaning up introduces other problems

FENET THEMATIC NETWORKCOMPETITIVE AND SUSTAINABLE GROWTH(GROWTH) PROGRAMME

Meshing works well at the intersection longitudinal - shell

FENET THEMATIC NETWORKCOMPETITIVE AND SUSTAINABLE GROWTH(GROWTH) PROGRAMME

X

Y

Z

V1

Meshing works well at the intersection webframe - shell

FENET THEMATIC NETWORKCOMPETITIVE AND SUSTAINABLE GROWTH(GROWTH) PROGRAMME

Conclusion– CAD producing surfaces promising in shipbuilding

– Frequently the success story is based on volumes to volumes

– Volumes to midsurfaces induces a tremendous amount of work

– Hard copy with scantlings far more efficient

– File with essential keypoints however is most welcome

– Organisation shall be modified to cope with interaction: design - analysis