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Pure Tungsten HCal : ‘staircase’ design

Pure Tungsten HCal : ‘staircase’ design. Structural analyses and possible optimizations. The design. Basic Facts. Total weight : c. 640 tons + weight of ECal. Internal radius : 1400mm. Interior arc width : 494mm. Length : 3500mm. Exterior arc width : 972mm. 3 MODULES = 1 SECTOR.

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Pure Tungsten HCal : ‘staircase’ design

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  1. Pure Tungsten HCal: ‘staircase’ design Structural analyses and possible optimizations

  2. The design Niall O Cuilleanain (Supervisor: H. Gerwig)

  3. Basic Facts Total weight: c. 640 tons + weight of ECal Internal radius: 1400mm Interior arc width: 494mm Length: 3500mm Exterior arc width: 972mm

  4. 3 MODULES = 1 SECTOR External Middle Internal

  5. TUNGSTEN PLATES INSERTION First module ready to beassembledwith the next sideview spacer next plate The first 6 plates are boltedtogetherbetweenspacers and the followingstwo by two A specifictool for insertion isneeded due to the fragility of the plates screw

  6. What has been looked at? Niall O Cuilleanain (Supervisor: H. Gerwig)

  7. What has been looked at? • Initial analysis of single sector Niall O Cuilleanain (Supervisor: H. Gerwig)

  8. What has been looked at? • Initial analysis of single sector • Added rigidity of tungsten plates in single sector Niall O Cuilleanain (Supervisor: H. Gerwig)

  9. What has been looked at? • Initial analysis of single sector • Added rigidity of tungsten plates in single sector • Crane supports of single sector Niall O Cuilleanain (Supervisor: H. Gerwig)

  10. What has been looked at? • Initial analysis of single sector • Added rigidity of pure tungsten plates in single sector • Crane supports of single sector • Initial analysis of individual pure tungsten plates Niall O Cuilleanain (Supervisor: H. Gerwig)

  11. What has been looked at? • Initial analysis of single sector • Added rigidity of tungsten plates in single sector • Crane supports of single sector • Initial analysis of individual tungsten plates • Initial analysis of entire module Niall O Cuilleanain (Supervisor: H. Gerwig)

  12. What has been looked at? • Initial analysis of single sector • Added rigidity of tungsten plates in single sector • Crane supports of single sector • Initial analysis of individual tungsten plates • Initial analysis of entire module • Effect of the added load of the ECal Niall O Cuilleanain (Supervisor: H. Gerwig)

  13. What has been looked at? • Initial analysis of single sector • Added rigidity of tungsten plates in single sector • Crane supports of single sector • Initial analysis of individual tungsten plates • Initial analysis of entire module • Effect of the added load of the ECal • Optimization Niall O Cuilleanain (Supervisor: H. Gerwig)

  14. Single sector Dimensions of note: Exterior shell/ plate: 75mm Interior shell/ plate: 46.5mm “Fins” External: 30mm Middle: 25mm Internal: 18mm Niall O Cuilleanain (Supervisor: H. Gerwig)

  15. Single sector - Deformation Niall O Cuilleanain (Supervisor: H. Gerwig)

  16. Single sector – V. Mises Niall O Cuilleanain (Supervisor: H. Gerwig)

  17. Analysis of added rigidity of tungsten plates to a single sector Model 1 (steel structure only): The Tungsten plates are represented by a virtual density. In this case, the tungsten is ‘dead weight’. Model 2 (both steel structure & the connected Tungsten plates): The plates are ‘bonded’ to the structure as opposed to bolted. The added rigidity of the plates will, in reality, not be so great. Both models are supported at the section’s external face, and are loaded under Standard Gravity. Niall O Cuilleanain (Supervisor: H. Gerwig)

  18. Analysis of added rigidity of tungsten plates to a single sector Niall O Cuilleanain (Supervisor: H. Gerwig)

  19. Crane supports Niall O Cuilleanain (Supervisor: H. Gerwig)

  20. Crane supports • 4 different configurations were chosen and compared Niall O Cuilleanain (Supervisor: H. Gerwig)

  21. Crane support “1” Niall O Cuilleanain (Supervisor: H. Gerwig)

  22. Crane support “1” -Deformation Niall O Cuilleanain (Supervisor: H. Gerwig)

  23. Crane support “1”- V. Mises Niall O Cuilleanain (Supervisor: H. Gerwig)

  24. Crane support “2” Niall O Cuilleanain (Supervisor: H. Gerwig)

  25. Crane support “2” -Deformation Niall O Cuilleanain (Supervisor: H. Gerwig)

  26. Crane support “2” – V. Mises Niall O Cuilleanain (Supervisor: H. Gerwig)

  27. Crane support “3” Niall O Cuilleanain (Supervisor: H. Gerwig)

  28. Crane support “3” - Deformation Niall O Cuilleanain (Supervisor: H. Gerwig)

  29. Crane support “3” – V. Mises Niall O Cuilleanain (Supervisor: H. Gerwig)

  30. “Ideal” crane support Niall O Cuilleanain (Supervisor: H. Gerwig)

  31. “Ideal” crane support - Deformation Niall O Cuilleanain (Supervisor: H. Gerwig)

  32. “Ideal” crane support – V. Mises Niall O Cuilleanain (Supervisor: H. Gerwig)

  33. Crane support Niall O Cuilleanain (Supervisor: H. Gerwig)

  34. Crane support “3” Niall O Cuilleanain (Supervisor: H. Gerwig)

  35. Crane support • It is clear from the analyses where from one should support the sector while it is being hoisted by a crane during assembly. • (This analysis will be useful again as comparison with the optimization of the number of contact regions between sectors). Niall O Cuilleanain (Supervisor: H. Gerwig)

  36. Simple Tungsten plate analysis 2 different plates were analyzed: Niall O Cuilleanain (Supervisor: H. Gerwig)

  37. Simple Tungsten plate analysis 2 different plates were analyzed: -The top plate of a sector, Niall O Cuilleanain (Supervisor: H. Gerwig)

  38. Simple Tungsten plate analysis 2 different plates were analyzed: -The top plate of a sector, -and the bottom plate of a sector Niall O Cuilleanain (Supervisor: H. Gerwig)

  39. Niall O Cuilleanain (Supervisor: H. Gerwig)

  40. Simple Tungsten plate analysis The bottom plate was also analyzed at 3 different thicknesses: -10mm -12mm -13,5mm Niall O Cuilleanain (Supervisor: H. Gerwig)

  41. 12mm appears to be a reasonable value Niall O Cuilleanain (Supervisor: H. Gerwig)

  42. Entire Lattice Max. V. Mises: 53. 178 MPa. Max. Deformation: 0.758 mm. *Virtual density applied = 62.55 Niall O Cuilleanain (Supervisor: H. Gerwig)

  43. Additional loading of the ECal The loading of the ECal is approximated by a remote force applied at the centre of the structure Niall O Cuilleanain (Supervisor: H. Gerwig)

  44. Additional loading of the ECal The loading of the ECal is approximated by a remote force applied at the centre of the structure And it acts on the inner surface of the HCal. Niall O Cuilleanain (Supervisor: H. Gerwig)

  45. Additional loading of the ECal Niall O Cuilleanain (Supervisor: H. Gerwig)

  46. What next? • Following the initial analyses, the next step was to see where the structure could be optimized, in doing so optimizing the tungsten’s surface area within the structure. Niall O Cuilleanain (Supervisor: H. Gerwig)

  47. What next? Possible optimization points of the structure: Contact regions between sectors Niall O Cuilleanain (Supervisor: H. Gerwig)

  48. What next? Possible optimization points of the structure: Contact regions between sectors “Fin” thickness Niall O Cuilleanain (Supervisor: H. Gerwig)

  49. What next? Possible optimization points of the structure: Contact regions between sectors “Fin” thickness Exterior shell thickness Niall O Cuilleanain (Supervisor: H. Gerwig)

  50. What next? Possible optimization points of the structure: Contact regions between sectors “Fin” thickness Exterior shell thickness Interior shell thickness Niall O Cuilleanain (Supervisor: H. Gerwig)

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