NSTX Thomson Scattering and NB Analysis Update: Maxwell /ANSYS Generated EM Loads

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