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CAD-freie FE-
Modellierung in der
Konzeptfindungsphase
mit Hilfe von FE-
Baukästen
A l e x a n d r u D a d a l a u , A U M 2 0 1 4 S c h w e i z
B i l d m a t e r i a l t e i l w e i s e v o n I S W U n i S t u t t g a r t , D F G - S P P 1 4 7 6
CAD-frei
Parametrisch
Teil-Instanzen
Änderungs-
robust
Wieder-
verwendbar
Effizient
Q u e l l e : I S W U n i S t u t t g a r t , D F G - S P P 1 4 7 6
D e r k l a s s i s c h e
D e s i g n - A n a l y s e -
Z y k l u s
Design
Analyse
Change single parts
Preprocessing
Assign materials
Assign sheet thicknesses,
Remodel not importable models
Generate whole FE mesh
Redefine selections
Starting computation,
Processing results
Generate CAD assembly
Update CAD assembly
Import / Update CAD assembly
Native / universal CAD format
Simplify CAD geometry
Prepare geometry for meshing
Dieses Vorgehen hat
einen vertretbaren
Aufwand für
einmalige Modelle,
oder für
geringfügige
Modelländerungen,
ist aber zu teuer in
der
Konzeptfindungs-
phase (viele
Modellvarianten,
signifikante
Modelländerungen)
D e r n e u e
D e s i g n - A n a l y s e -
Z y k l u s
Standardkomponenten
Führungswagen Block / Führungsschiene Rohr
Spezialkomponenten
Verbindungsstück Adapterplatte Gleitführung
Das Modell sieht
komplex aus, ist
es aber nicht.
Nur 6 Modell-
komponenten!
K o m p o n e n t e n o r i e n t i e r t
a r b e i t e n
W e n n m ö g l i c h , a u f
C A D - M o d e l l i e r u n g
v e r z i c h t e n
V o r h a n d e n e
M o d e l l k o m p o n e n t e n
w i e d e r v e r w e n d e n
Demo: Kleine Werkzeugmaschine (DFG-SPP 1476)
Die FE-Modellkomponente:
Ein abgeschlossenes, wiederverwendbares FE-Modell
Die parametrische FE-Modellkomponente. Bspw. mit APDL:
 Geometrie
 Material
 Netz
 Schnittstellen
Geometrie (Länge, Durchmesser,
Wandstärke, Endflächenwinkel)
Netz (Feinheit, Quadratische Elemente,
Material)
APDL-Makro für ein parametrisches FE-Modell eines Rohrs
Submakros für die Definition von
 Geometrie
 Eigenschaften (Typen, Materialien,
Real Constants, usw.)
 Netz
 Schnittstellen
Außenzylinder
Innenzylinder
Bohrung
Demo: Kleine Werkzeugmaschine (DFG-SPP 1476)
Design & Analyse Import ready-to-use FE models
from the FE library
Starting computation,
Processing results
Generate FE assembly
Adapt
Change parameters
Replace single FE models
Neuer Design-Analyse-Zyklus
Alter Design-Analyse-Zyklus
W e n n e i n C A D - S y s t e m
v e r w e n d e t w i r d ,
d a n n i s t e s u n w i c h t i g
w e l c h e s ,
d a d i e B a u g r u p p e n e r s t
i n d e r F E - U m g e b u n g
e n t s t e h e n
W o h e r d i e e i n z e l n e n
F E - M o d e l l e k o m m e n ,
i s t u n w i c h t i g :
 A n s y s M A P D L ,
 A n s y s W o r k B e n c h
 A b a q u s u s w .
E i n e F E - B i b l i o t h e k u n d
d i e W i e d e r v e r w e n d u n g
v o n F E - M o d e l l e n s e n k t
d i e F e h l e r -
w a h r s c h e i n l i c h k e i t
d r a m a t i s c h .
W e i t e r e B e i s p i e l e f ü r
p a r a m e t r i s c h e , C A D -
f r e i e F E - B a u g r u p p e n
K u g e l g e w i n d e t r i e b
Modelliert zu 100% aus parametrischen
FE-Modellkomponenten aus der FE-Modellbibliothek
W ä l z l a g e r
Modelliert zu 100% aus parametrischen
FE-Modellkomponenten aus der FE-Modellbibliothek
H a n d l i n g s y s t e m
Modelliert zu 100% aus parametrischen
FE-Modellkomponenten aus der FE-Modellbibliothek
w w w . m e s h p a r t s . d e
Vielen Dank für Ihre Aufmerksamkeit!

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CAD-freie FE-Modellierung in der Konzeptfindungsphase mit Hilfe von FE-Baukästen für Ansys

  • 1. CAD-freie FE- Modellierung in der Konzeptfindungsphase mit Hilfe von FE- Baukästen A l e x a n d r u D a d a l a u , A U M 2 0 1 4 S c h w e i z B i l d m a t e r i a l t e i l w e i s e v o n I S W U n i S t u t t g a r t , D F G - S P P 1 4 7 6
  • 2. CAD-frei Parametrisch Teil-Instanzen Änderungs- robust Wieder- verwendbar Effizient Q u e l l e : I S W U n i S t u t t g a r t , D F G - S P P 1 4 7 6
  • 3. D e r k l a s s i s c h e D e s i g n - A n a l y s e - Z y k l u s
  • 4. Design Analyse Change single parts Preprocessing Assign materials Assign sheet thicknesses, Remodel not importable models Generate whole FE mesh Redefine selections Starting computation, Processing results Generate CAD assembly Update CAD assembly Import / Update CAD assembly Native / universal CAD format Simplify CAD geometry Prepare geometry for meshing Dieses Vorgehen hat einen vertretbaren Aufwand für einmalige Modelle, oder für geringfügige Modelländerungen, ist aber zu teuer in der Konzeptfindungs- phase (viele Modellvarianten, signifikante Modelländerungen)
  • 5. D e r n e u e D e s i g n - A n a l y s e - Z y k l u s
  • 6. Standardkomponenten Führungswagen Block / Führungsschiene Rohr Spezialkomponenten Verbindungsstück Adapterplatte Gleitführung Das Modell sieht komplex aus, ist es aber nicht. Nur 6 Modell- komponenten!
  • 7. K o m p o n e n t e n o r i e n t i e r t a r b e i t e n W e n n m ö g l i c h , a u f C A D - M o d e l l i e r u n g v e r z i c h t e n V o r h a n d e n e M o d e l l k o m p o n e n t e n w i e d e r v e r w e n d e n
  • 9. Die FE-Modellkomponente: Ein abgeschlossenes, wiederverwendbares FE-Modell Die parametrische FE-Modellkomponente. Bspw. mit APDL:  Geometrie  Material  Netz  Schnittstellen Geometrie (Länge, Durchmesser, Wandstärke, Endflächenwinkel) Netz (Feinheit, Quadratische Elemente, Material)
  • 10. APDL-Makro für ein parametrisches FE-Modell eines Rohrs Submakros für die Definition von  Geometrie  Eigenschaften (Typen, Materialien, Real Constants, usw.)  Netz  Schnittstellen Außenzylinder Innenzylinder Bohrung
  • 12. Design & Analyse Import ready-to-use FE models from the FE library Starting computation, Processing results Generate FE assembly Adapt Change parameters Replace single FE models Neuer Design-Analyse-Zyklus Alter Design-Analyse-Zyklus
  • 13. W e n n e i n C A D - S y s t e m v e r w e n d e t w i r d , d a n n i s t e s u n w i c h t i g w e l c h e s , d a d i e B a u g r u p p e n e r s t i n d e r F E - U m g e b u n g e n t s t e h e n
  • 14. W o h e r d i e e i n z e l n e n F E - M o d e l l e k o m m e n , i s t u n w i c h t i g :  A n s y s M A P D L ,  A n s y s W o r k B e n c h  A b a q u s u s w .
  • 15. E i n e F E - B i b l i o t h e k u n d d i e W i e d e r v e r w e n d u n g v o n F E - M o d e l l e n s e n k t d i e F e h l e r - w a h r s c h e i n l i c h k e i t d r a m a t i s c h .
  • 16. W e i t e r e B e i s p i e l e f ü r p a r a m e t r i s c h e , C A D - f r e i e F E - B a u g r u p p e n
  • 17. K u g e l g e w i n d e t r i e b Modelliert zu 100% aus parametrischen FE-Modellkomponenten aus der FE-Modellbibliothek
  • 18. W ä l z l a g e r Modelliert zu 100% aus parametrischen FE-Modellkomponenten aus der FE-Modellbibliothek
  • 19. H a n d l i n g s y s t e m Modelliert zu 100% aus parametrischen FE-Modellkomponenten aus der FE-Modellbibliothek
  • 20. w w w . m e s h p a r t s . d e Vielen Dank für Ihre Aufmerksamkeit!