NSTX Supported by NSTX Centerstack Upgrade Project Meeting P. Titus/EA Branch November 17, 2010 Lid/Cover/Flex Aluminum Block Bolting Stress And Stresses.

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Presentation transcript:

NSTX 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

Produces 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 Proposed Reinforcement

No Reinforcement With Proposed Welded Reinforcement Plate

Preloaded Bolt Reinforcement ~90000psi Preload 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 add In TF Flag Calc?