Buckling Calculations and Measurements on a Technologically Relevant Toroidal Magnet System

[+] Author and Article Information
W. Geiger

Institut für Datenverarbeitung in der Technik, Kernforschungszentrum Karlsruhe, D-7500 Karlsruhe, Federal Republic of Germany

K. P. Jungst

Institut für Technische Physik, Kernforschungszentrum Karlsruhe, D-7500 Karlsruhe, Federal Republic of Germany

J. Appl. Mech 58(1), 167-174 (Mar 01, 1991) (8 pages) doi:10.1115/1.2897144 History: Received April 10, 1989; Revised October 27, 1989; Online March 31, 2008


The coils in a toroidal magnet system may deform laterally and become mechanically unstable when a critical value of the current is exceeded as a result of magnetoelastic coupling. This instability is called magnetoelastic buckling. It was studied in the TESPE arrangement, a toroidal magnet system the design and size of which meet technical demands. A generalized theoretical model was developed for the calculation of the buckling behavior of toroidal magnet systems. It was shown by the measurements that in a torus of complex design, the lateral elastic stiffnesses of the coils may vary considerably with the current. Monitoring of the natural frequencies of the vibration modes proved to be a suitable method for the supervision of the mechanical stability during operation.

Copyright © 1991 by The American Society of Mechanical Engineers
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