Granary Square – King Cross Lighting Mast
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Granary Square – King Cross Lighting Mast
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Granary Square – King Cross Lighting Mast
- 1. St.Petersburg State Polytechnical University Institute of Materials and Technology CompMechLab ® CAD/FEA/CFD/CAE Centre of Exellence 1 5th Mikkeli Computational Mechanics Workshop’2010 CompMech’2010 CAD/FEA/CAE in Action! Mikkeli University of Applied Sciences Research Centre YTI, Finland August 2-6, 2010 Main title
- 2. St.Petersburg State Polytechnical University Institute of Materials and Technology CompMechLab ® CAD/FEA/CFD/CAE Centre of Exellence 2 The 5-th Computational Mechanics Workshop Granary Square – King Cross Lighting Mast C o m p M e c h ’ 2 0 1 0 , M i k k e l i , F i n l a n d Yury Novozhilov
- 3. St.Petersburg State Polytechnical University Institute of Materials and Technology CompMechLab ® CAD/FEA/CFD/CAE Centre of Exellence 3 Z X Y~6m ~9m ~9.5m ~13.4m 40 kg 38.4 kg 38.4 kg 20 kg 400 mm 500mm Variable thickness Basement plate thickness = 30 mm Lighting Mast Design
- 4. St.Petersburg State Polytechnical University Institute of Materials and Technology CompMechLab ® CAD/FEA/CFD/CAE Centre of Exellence 4 Z X Y 8-node shell elements NE 59 453 NN 182 574 NDOF 1 095 444 Sheet metal properties: • E = 210 GPa • ν = 0.3 • ρ = 7800 kg/m3 • ϭ0.2(Y) = 355 MPa FE model
- 5. St.Petersburg State Polytechnical University Institute of Materials and Technology CompMechLab ® CAD/FEA/CFD/CAE Centre of Exellence 5 Z Y Shell thickness, mm Freq, Hz Shell mass, kg 8 1.372 2187 6 1.240 1640 8-6-4 1.386 1641 • All DOFs for all bolts are fixed • Prestress from gravity Eigen frequency and first mode
- 6. St.Petersburg State Polytechnical University Institute of Materials and Technology CompMechLab ® CAD/FEA/CFD/CAE Centre of Exellence 6 Z X Y Wind load (Z-direction) 1.2g=11.77m/s2 1 2 3 3 4 4 Z X Bolts group number Fixed DOFs 1 UX = UY = 0 2 UX =UY = UZ = 0 3 UY = 0 4 UY = UZ = 0 Wind load (Z-direction) Boundary condition
- 7. St.Petersburg State Polytechnical University Institute of Materials and Technology CompMechLab ® CAD/FEA/CFD/CAE Centre of Exellence 7 Z Y Z-direction displacements Shell thickness, mm Maximal deflection, mm 8 139 6 220 8-6-4 232 0 mm 40 mm 80 mm 120 mm 160 mm 240 mm 200 mm Displacement scaling is 5
- 8. St.Petersburg State Polytechnical University Institute of Materials and Technology CompMechLab ® CAD/FEA/CFD/CAE Centre of Exellence 8 Z X Y Von Mises stress (8 mm) 0 MPa 50 MPa 100 MPa 150 MPa 200 MPa 250 MPa 300 MPa 355 MPa
- 9. St.Petersburg State Polytechnical University Institute of Materials and Technology CompMechLab ® CAD/FEA/CFD/CAE Centre of Exellence 9 Bolts forces and basement von Mises stress(8 mm) Shell thickness, mm Forces at basement, kN FX FY FZ 1 0.0 22.2 0 2 0.0 40.5 0 3 0.0 -44.1 0 4 0.0 -23.1 -3.3 5 -6.7 -79.8 -3.3 6 5.9 -90.8 -4.5 7 0.0 -30.4 -5.5 8 0.0 -55.0 0 9 0.0 47.2 0 10 0.0 27.3 0 11 -4.8 82.4 0 12 5.6 74.9 0 1 2 3 9 4 7 5 6 810 11 12 Z X 0 MPa 50 MPa 100 MPa 150 MPa 200 MPa 250 MPa 300 MPa 355 MPa
- 10. St.Petersburg State Polytechnical University Institute of Materials and Technology CompMechLab ® CAD/FEA/CFD/CAE Centre of Exellence 10 Z X Y Von Mises stress (6 mm) 0 MPa 50 MPa 100 MPa 150 MPa 200 MPa 250 MPa 300 MPa 355 MPa
- 11. St.Petersburg State Polytechnical University Institute of Materials and Technology CompMechLab ® CAD/FEA/CFD/CAE Centre of Exellence 11 Bolts forces and basement von Mises stress (6 mm) Shell thickness, mm Forces at basement, kN FX FY FZ 1 0.0 20.2 0.0 2 0.0 41.0 0.0 3 0.0 -43.6 0.0 4 0.0 -20.6 -2.9 5 -6.8 -77.3 -3.5 6 6.3 -92.3 -4.8 7 0.0 -30.3 -5.5 8 0.0 -58.5 0.0 9 0.0 51.8 0.0 10 0.0 28.0 0.0 11 -5.3 85.5 0.0 12 5.8 73.8 0.0 1 2 3 9 4 7 5 6 810 11 12 Z X 0 MPa 50 MPa 100 MPa 150 MPa 200 MPa 250 MPa 300 MPa 355 MPa
- 12. St.Petersburg State Polytechnical University Institute of Materials and Technology CompMechLab ® CAD/FEA/CFD/CAE Centre of Exellence 12 Z X Y Von Mises stress (8-6-4 mm) 0 MPa 50 MPa 100 MPa 150 MPa 200 MPa 250 MPa 300 MPa 355 MPa
- 13. St.Petersburg State Polytechnical University Institute of Materials and Technology CompMechLab ® CAD/FEA/CFD/CAE Centre of Exellence 13 Bolts forces and basement von Mises stress (8-6-4 mm) Shell thickness, mm Forces at basement, kN FX FY FZ 1 0.0 22.0 0.0 2 0.0 40.6 0.0 3 0.0 -42.9 0.0 4 0.0 -22.5 -3.2 5 -6.7 -78.5 -3.4 6 5.9 -90.6 -4.5 7 0.0 -30.5 -5.5 8 0.0 -54.9 0.0 9 0.0 48.3 0.0 10 0.0 27.9 0.0 11 -4.9 83.7 0.0 12 5.6 75.1 0.0 1 2 3 9 4 7 5 6 810 11 12 Z X 0 MPa 50 MPa 100 MPa 150 MPa 200 MPa 250 MPa 300 MPa 355 MPa
- 14. St.Petersburg State Polytechnical University Institute of Materials and Technology CompMechLab ® CAD/FEA/CFD/CAE Centre of Exellence 14 Z X Y Basement reactions Shell thickness, mm Forces at basement, kN FX FY FZ 8 0.0 -27.7 -16.7 6 0.0 -21.3 -15.4 8-6-4 0.0 -21.2 -15.4 Shell thickness, mm Moments at basement, kN/m MX MY MZ 8 -121.4 1.1 -2.2 6 -110.4 0.0 -2.1 8-6-4 -110.4 0.0 -2.2
- 15. St.Petersburg State Polytechnical University Institute of Materials and Technology CompMechLab ® CAD/FEA/CFD/CAE Centre of Exellence 15 Conclusions • 3D FE model (3 iteration of shell thickness) • Eigen frequency and first mode • Deformed shape from wind load • Stress distribution from wind load • Bolts forces • Forces and moments for basement Possible future plans • Buckling analysis • Parametrical model • Multicriteria optimization • Submodeling of joints
- 16. St.Petersburg State Polytechnical University Institute of Materials and Technology CompMechLab ® CAD/FEA/CFD/CAE Centre of Exellence 16 Thank you for attention! Yury Novozhilov