Midas NFX: MeshFree Reliability of Results

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Reliability of Results

NAFEMS reference results for unit model, Comparison of FEM analysis results for practical model

• NAFEMS Theoretical Value and Verification
• Comparison With FEM Results
• Comparison With Practical Model

 

NAFEMS - Theoretical Value and Verification

Scordellis-Lo barrel vault (gravity load)

Vertical displacement at point A (ft)

Reference: -0.3024

MeshFree: -0.3025

% Difference (MeshFree/Theory): 0.04%

 

Elliptic membrane under uniform outward pressure

Stress_yy at point A

Reference: 92.7 MPa

MeshFree: 92.6 MPa

% Difference (MeshFree/Theory): 0.11%

 

 

Comparison with FEM Results

MeshFree Results (Model 1)

1st Mode: 24.8 Hz

2nd Mode: 24.9 Hz

Max. displacement: 0.0733 mm

Max. stress: 2.86 MPa

 

FEM Results (Model 1)

1st Mode: 24.8 Hz

2nd Mode: 25.0 Hz

Max. displacement: 0.0730 mm

Max. stress: 2.90 MPa

 

MeshFree Results (Model 2)

Max. temperature: 144 (ºC)

 

FEM Results (Model 2)

Max. temperature: 142 (ºC)

 

MeshFree Results (Model 3)

Max. temperature: 144 (ºC)

 

FEM Results (Model 2)

Max. temperature: 142 (ºC)

 

 

Comparison with Practical Model

MeshFree Results (Model 1)

144 (ºC)

 

FEM Results (Model 1)

142 (ºC)

 

MeshFree Results (Model 2)

0.3016 mm

 

FEM Results (Model 2)

0.3033 mm

 

MeshFree Results (Model 3)

0.55 mm

 

FEM Results (Model 3)

0.56 mm

 

MeshFree Results (Model 4)

-20.0 mm

 

FEM Results (Model 4)

-21.0 mm

Speaker :  Hannah Hwang Category : Mechanical Software : midas MeshFree Date : 2018-08-15