User’s perspective: Structural
engineering solutions on the
Grid
Dr. sc.ing Kaspars Kalnins
Kaspars.Kalnins@sigmanet.lv
Riga Technical University, Institute of Materials and
Structures
• Commercial finite element code - ANSYS for
structural engineering applications with
physical validation.
Metamodelling
methodology
Domain of interest
Fixed design input
variables
Design and evaluation of
computer experiments
FEM, multibody dinamics
Design and
evaluation of natural
experiments
Load-shortening
curves
Identification of the
pre-buckling and postbuckling behaviour
Piece-wise linear
approximation
Input-output
data
Validation and
verification
Shrinkage of search
region
Metamodel building
Different parametric
and non-parametric
approximations
Design guidelines
Parametric sensitivity
Weight savings
Framework Programme - 6 project: COCOMAT
COCOMAT
Next generation –
All composite fuselage structure
A curved CFRP panels which are
understood as parts of a fuselage section.
Structural engineering challenges for the future full
composite aircraft structures
•
The context of European industrial competitiveness and sustainable
development
– Future possibilities of application of composite materials in primary
structures
– Need of redefining of design guidelines compared to those used in
conventional metal structures
– Development of new type tool`s capable of fast and reliable structural
dimensioning
Numerical simulations versus
physical experiments
Physical experiments – stiffened composite panels
Physical experiments – composite cylinders
RTU #1-1
RTU #1-2
RTU #1-5
RTU #1-3
RTU #1-6
RTU #1-4
RTU #1-7
Physical
experiments
composite deck structure
–
P
SYM.
SYM.
K1
T2 x tg(K1)
B
T2
B
T3
H1
H
SYM.
T1
Physical
experiments
–
plywood sandwich structures
Physical
experiments
–
plywood sandwich structures
1.00
0.95
Stiffness ratio ∆K
0.90
0.85
0.80
H =27 mm
H =30 mm
H =35 mm
H =40 mm
0.75
0.70
0.65
0.4
0.5
0.6
0.7
Weight efficiency ratio ∆W
0.8
0.9
Implementation of ANSYS in Grid thought the
Migrating Desktop tool
Implementation of ANSYS in Grid thought the
LU MII Gridification tool (Grinder)
S
s f tp
IN
IN
s ft
p
OUT
OUT
he ta
t
g
n
i
p l it t
sk
Implementation of ANSYS in Grid thought the
LU MII Gridification tool (Grinder)
Plywood sandwich
1296 samples
Single
PC
GRID – 10 nodes
GRID – 15 nodes
30 h
3h
2h
15 h
1.6 h
1.1 h
Implicit – linear
solver
Composite cylinders
36 samples
Explicit – non-linear
solver
User’s perspective: Structural
engineering solutions on the
Grid
Thank you!
Dr. sc.ing Kaspars Kalnins
Kaspars.Kalnins@sigmanet.lv
Riga Technical University, Institute of Materials and
Structures