Finite Element Analysis
Stadium Arched-Roof Truss
Stadium Arched-Roof Truss
Workshop Objectives:
• Build a truss model and analyze it. • Determine the maximum displacement and stresses. Visualize the load path in the truss by plotting the rod element axial stresses. • Follow the load from the load application point to the fixed base. ������
Do the stresses make sense to you?
Problem Description������
• Truss design is presented on the previous page and the positions of joint is presented in the following table. • The truss is made from steel with E = 30 x 106 psi and ν= 0.3.������ • The cross-sectional area is A = 4.516 in2.������ • The torsional constant is 37.398 in4.������ • A 500-lb point load is applied at (60,168,0).������ • The truss is bolted down at the Y=0 boundary.������ • Model the truss with rod elements.
Position of Joints
X Y Z
1
2
420
576
0
0
0
0
3
4
720
636
0
96
0
0
5
6 7 8 9 10 11 12 13
540
420 240 108 0 60 180 300 480
180
252 288 264 216 168 192 156 120
0
0 0 0 0 0 0 0 0
Suggested Exercise Steps 1. 2. 3. 4. 5. 6. 7. 8. 9. Create a new database Create nodes and elements Create Material Properties Create Physical Properties Apply Loads and Boundary Conditions Run the finite element analysis using MSC.Nastran Read the results into MSC.Patran Plot displacements and stresses Examine the .f06 file
Create Nodes
Finish creating all 11 nodes
Create Elements
Finish creating all 24 elements
Stadium Arched-Roof Truss
Workshop Objectives:
• Build a truss model and analyze it. • Determine the maximum displacement and stresses. Visualize the load path in the truss by plotting the rod element axial stresses. • Follow the load from the load application point to the fixed base. ������
Do the stresses make sense to you?
Problem Description������
• Truss design is presented on the previous page and the positions of joint is presented in the following table. • The truss is made from steel with E = 30 x 106 psi and ν= 0.3.������ • The cross-sectional area is A = 4.516 in2.������ • The torsional constant is 37.398 in4.������ • A 500-lb point load is applied at (60,168,0).������ • The truss is bolted down at the Y=0 boundary.������ • Model the truss with rod elements.
Position of Joints
X Y Z
1
2
420
576
0
0
0
0
3
4
720
636
0
96
0
0
5
6 7 8 9 10 11 12 13
540
420 240 108 0 60 180 300 480
180
252 288 264 216 168 192 156 120
0
0 0 0 0 0 0 0 0
Suggested Exercise Steps 1. 2. 3. 4. 5. 6. 7. 8. 9. Create a new database Create nodes and elements Create Material Properties Create Physical Properties Apply Loads and Boundary Conditions Run the finite element analysis using MSC.Nastran Read the results into MSC.Patran Plot displacements and stresses Examine the .f06 file
Create Nodes
Finish creating all 11 nodes
Create Elements
Finish creating all 24 elements