TOKAMAK solenoid mechanical stress - QuickField simulation example
The central solenoid of the ohmic heating system for a TOKAMAK fusion device.
How can magnetic forces and resulting mechanical stress be calculated in a TOKAMAK central solenoid?
Answer Typical applications Geometry
Given
Copper of coils:
Plastic structure:
Solution
The solenoid consists of 80 superconducting coils fixed in common plastic structure. Due to mirror symmetry one half of the structure is modeled.
The Coupl4MS.pbm is the problem of calculating the magnetic field generated by the solenoid, and Coupl4SA.pbm analyzes stresses and deformations in coils and plastic structure due to Lorentz forces acting on the coils.
Results
Mechanical stress distribution in TOKAMAK solenoid:
Engineering question
Calculate Lorentz forces in an axisymmetric DC-magnetic model and transfer them to a stress analysis of the coils and supporting structure.
tokamak solenoid coils, fusion reactor magnets, superconducting solenoids
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Simulation problem
Problem Type
Axisymmetric multiphysics problem of DC magnetics coupled to Stress analysis.
Current density in coils j = 3·108 A/m²;
Magnetic permittivity of plastic, coils and liquid helium inside coils μ = 1.
Young's modulus E = 7.74·1010 N/m²;
Poisson's ratio ν = 0.335;
Maximum allowable stress: 2.2·108 N/m².
Young's modulus E = 2·1011 N/m²;
Poisson's ratio ν = 0.35;
Maximum allowable stress: 109 N/m².
Magnetic flux density distribution in TOKAMAK solenoid:
Video
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