Coupling between eddy current and deflection in cantilevered beams in magnetic fields

Thesis/Dissertation · Wed Jan 01 04:00:00 EST 1986

OSTI ID:5333441

Hua, T Q

Experiments were performed to investigate the coupling between eddy currents and deflection in cantilevered beams in longitudinal and transverse magnetic fields. This coupling effect reduces the current, deflection, and material stress to levels far less severe than would be predicted if coupling is disregarded. The experiments were conducted using the FELIX (Fusion ELectromagnetic Induction experiment) facility at the Argonne National Laboratory. The beams, which provide a simple model for the limiter blades in a tokamak fusion reactor, are subjected to crossed time-varying and constant magnetic fields. The time-varying field simulates the decaying field during a plasma disruption and the constant field models the toroidal field. Several test pieces are employed to allow variations in thicknesses and mechanical and electrical properties. Various magnetic field levels and decay time constants of time-varying are used to study the extent of the coupling from weak to strong coupling. The ratios of constant field to time-varying field are kept in the range from 10:1 to 20:1 as would be appropriate to tokamak limiters. Major parameters measured as functions of time are beam deflection, measured with an electro-optical device; total circulating current, measured with a Rogowski coil; strain recorded by strain gauges; and magnetic fields measured with Hall probes.

• Research Organization: Washington Univ., Seattle (USA)
• OSTI ID: 5333441
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700202* -- Fusion Power Plant Technology-- Magnet Coils & Fields
COUPLING
CURRENTS
EDDY CURRENTS
ELECTRIC CURRENTS
FELIX FACILITY
MAGNETIC FIELDS
MATERIALS
REACTOR MATERIALS
STRESS ANALYSIS
STRUCTURAL BEAMS
TEST FACILITIES
THERMONUCLEAR REACTORS
TOKAMAK TYPE REACTORS