CATIA - ANSYS, Perhaps someday the twain shall meet · CATIA - ANSYS, Perhaps someday the twain...

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.


ANSYS

FE model ANSYS interface

ProfessionalBase

Enterprise

FEMAP

CATIA CATIA viewer


FEMAPProfessional

Intermediate conversion

IGES, STEP, AutoCAD, µStation

Repairing, stitching, polishing

ANSYS

CATIA STandard for the Exchange of Product model data


–Typical example with volume models

With acknowledgements to Structural Dynamics Research Corp.


XYZ

V: Main ViewG: Presentation#1

Typical example in naval architecture


Why modelling in Volumes ?

Torpedoroom Moray


Watertight bulkhead of the Moray submarine


Surface on a volume’s face

ExcentricityGap


Stitching required


Shell missing

Bulkhead missingAutogenerated

structure

Model with flaws. Repair required


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


With acknowledgements to Gerard Dijkstra & PartnersDefault meshing in ANSYS


Model longitudinal - Webframe

CATIA delivers 26 solids


Bulb profile is not closed after stitching in FEMAP


CATIA > µSTATION with stitching > FEMAP goes well


Generation of midsurfaces produces unwanted areas


Presence of lugplate disturbs the process


Cleaning up introduces other problems


Meshing works well at the intersection longitudinal - shell


X

Y

Z

V1

Meshing works well at the intersection webframe - shell


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

CATIA - ANSYS, Perhaps someday the twain shall meet · CATIA - ANSYS, Perhaps someday the twain...

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