NSTX Thomson Scattering and NB Analysis Update: Maxwell/ANSYS Generated EM
Loads12-01-10
Steady-State Maxwell EM Analysis:PF and TF Coil Loads:
Current Scenario #79 with 10% Headroom
ANSYS WB Solid Model of Simplified Coil Assembly Exported to Maxwell
ANSYS WB Solid Model of Simplified Coil Assembly Exported to Maxwell (2)
Maxwell Solid Model with Vacuum Enclosure
Maxwell Results: Magnetic Flux Density on Y-Z PlaneCurrent Scenario #79 w/ Headroom
Maxwell and Opera Field Results Agree within 3%
Maxwell Results: Magnetic Flux Density on Coil SurfacesCurrent Scenario #79 w/ Headroom
Maxwell Results: Magnetic Flux Density on Coil Surfaces(2)Current Scenario #79 w/ Headroom
Maxwell Results: Current Density on Coil SurfacesCurrent Scenario #79 w/ Headroom
ANSYS WB Full Model Mesh
Hex Dominant MeshElement Size = 5 cm# Nodes = 685908# Elements = 131969
TF Outer Leg OOP Torque and Force, Fixed Ends, No Clevis LoadCurrent Scenario #79 w/ Headroom
TF OOP Torque = 1.271E06 ft-lbfTF OOP Force = 12 x 24,103 lbf = 2.892E05 lbf
TF Inner Leg OOP Torque, OOP Force/ Flag: Fixed EndsCurrent Scenario #79 w/ Headroom
OOP Torque = 9.99E04 ft-lbfOOP Force/Flag = 9.99E04 ft-lbf/ (1 ft x 36) = 2.775E03 lbf
Maxwell/ANSYS WB EM Generated Loads: Half Plane TF OOP TorqueCurrent Scenario #79w/ Headroom
Results1/2 Plane OOP Torque
(lbf-ft)
Maxwell/ ANSYS 2.492E+06
Design Spreadsheet 2.853E+06
Maxwell/ANSYS WB EM Generated Loads: PF1AU Vertical ForceCurrent Scenario #79 w/ Headroom
ResultsPF1AU Vertical Force
(lbf)
Maxwell/ ANSYS 2.324E+04
Design Spreadsheet 2.541E+04
Maxwell/ANSYS WB EM Generated Loads: PF2U Vertical ForceCurrent Scenario #79 w/ Headroom
ResultsPF2U Vertical Force
(lbf)
Maxwell/ ANSYS -3.073E+04
Design Spreadsheet -3.192E+04
Maxwell/ANSYS WB EM Generated Loads: PF3U Vertical ForceCurrent Scenario #79 w/ Headroom
ResultsPF3U Vertical Force
(lbf)
Maxwell/ ANSYS 6.394E+03
Design Spreadsheet 6.528E+03
Maxwell/ANSYS WB EM Generated Loads: PF5U Vertical ForceCurrent Scenario #79 w/ Headroom
ResultsPF5U Vertical Force
(lbf)
Maxwell/ ANSYS -2.496E+05
Design Spreadsheet -2.403E+05
Transient Maxwell EM Analysis:Vacuum Vessel Disruption Load:
Centered-Plasma Disruption Scenario
ANSYS WB Solid Model of Simplified Coil and VV Exported to Maxwell
Maxwell Solid Model with Vacuum Enclosure
Maxwell Vacuum Vessel Mesh:Required VV Mesh Settings: Element Length = 2.54 cm, Faceting Angle = 1 degree
Maxwell Results: Eddy Current Density on Vacuum VesselCentered-Plasma Disruption: Current Scenario #79 w/ Headroom Background Field
Maxwell Results: Magnetic Flux Density on Vacuum VesselCentered-Plasma Disruption: Current Scenario #79 w/ Headroom Background Field
ANSYS DM Solid Model: Vacuum Vessel w/ Port Extensions
ANSYS WB Static Structural Model: MeshRequired VV Mesh Settings: Automatic Sweep, # Divisions = 5; Mesh Size = 1 cm
Results for ½ Required Mesh Density
ANSYS Static Structural Results w/o Port Extensions: von Mises StressCentered-Plasma Disruption: Current Scenario #79 w/ Headroom Background Field
Results for ½ Required Mesh Density
ANSYS Static Structural Results w/o Port Extensions: von Mises Stress (2)Centered-Plasma Disruption: Current Scenario #79 w/ Headroom Background Field
Results for ½ Required Mesh Density
ANSYS Static Structural Results w/o Port Extensions: von Mises Stress (3)Centered-Plasma Disruption: Current Scenario #79 w/ Headroom Background Field
Results for ½ Required Mesh Density
ANSYS Static Structural Results w/ Port Extensions: von Mises StressCentered-Plasma Disruption: Current Scenario #79 w/ Headroom Background Field
Results for ½ Required Mesh Density
Next Steps
• Rerun Analysis with Twice the Mesh Density– Maxwell model is now running, expect ANSYS
results by Friday
• Run Maxwell with Port Extensions included in Eddy Current Solution– Verify that not including Port Extensions in Eddy
Current solution is conservative
• Export Disruption Load to Global Model
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