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Optimization of a FEA Beam Element Model for Computational Speed and Accuracy. Brent Weight and Ryan Weight. Constant-Force Electrical Contact. Constant-Force Electrical Contact Cont. General Model. Keypoints and Line elements Lines divided into elements BC’s and Loads. - PowerPoint PPT Presentation
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Optimization of a FEA Beam Element Model for
Computational Speed and Accuracy
Brent Weight
and
Ryan Weight
Constant-Force Electrical Contact
Electrical Contact on Unit
Constant-Force Electrical Contact
Dock Motion
Cam
Printed Circuit Board
Docking Station
Dockable Unit
General Model
Keypoints and Line elements
Lines divided into elements
BC’s and Loads
1
2
45
6
7
8
9
10
1112
23
21
22
20
100
3
A
B
C
D
EF
G
H
IJ
FEA Optimization
Optimization requires numerous model calls Computationally expensive
Can we reduce the model run time?
Element Methods
1. Proportional MethodShorter beams have less elements
2. Equal MethodEach beam as same number of elements
Can we minimize the number of elements needed for an accurate model?
Results
NonLinear Original N/A 45.685 14.7 82NonLinear Proportional 10 45.685 13.12 50 39.0%Nonlinear Equal 9 45.687 11.84 43 47.6%Linear Proportional Not Feasible N/A N/A N/A N/ALinear Equal Not Feasible 3258 3.39 21 74.4%
Percentage of Time Saved
Converged Force (gf)
Elapsed Time (Sec)
Analysis Method Element MethodOptimal Number/ Ratio of Elements
CP Time (Sec)
Time SavingsMethod Number of Calls Elapsed Time (Sec) Elapsed Time (Hr) Time SavedOriginal 200 16400 4.56Optimal 200 8600 2.39
2.17
47 % Savings
Conclusion
Minimization results in significant time savings
Minimum of 9 elements per beam required Linearization will not work on this model