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NSTXNSTX Supported by
NSTX Centerstack Upgrade Project Meeting
P. Titus/EA Branch November 17, 2010
Lid/Cover/Flex
Aluminum Block Bolting Stress And Stresses with Proposed Reinforcements
Offsets Used to Impose Moments
Present Configuration
Present ConfigurationProduces High Bolt Stresses for the Upgrade Loads
The Upgrade PDR includes addition of a Reinforcing Plate
Postulated Weld
Tresca Stress in Umbrella Structure Plate
Present Configuration
ProposedReinforcement
No Reinforcement
With Proposed Welded Reinforcement Plate
Preloaded Bolt Reinforcement
~90000psiPreload Bolt Stress is About the Same
Welds
Extend these “Wings”
Welds
When the OOP force reaches 25% of nominal, the spoke lid springs upward
Spoke/Lid/Flex/Von Mises Stress peaks at 17.8ksi
Danny’s Crown Tooth Analysis
He added a radius and we re-oriented the fiberglass reinforcement – but we need the updated design.
Maybe Ali can addIn TF Flag Calc?
