Applied Mathematics and Mechanics (English Edition) ›› 1997, Vol. 18 ›› Issue (9): 825-834.

• Articles • Previous Articles     Next Articles

VNONLINEAR STABILITY ANALYSIS OF A CLAMPED ROD CARRYING ELECTRIC CURRENT

Cheng Changiun1,2, Yang Xiao2   

  1. 1. Shanghai Institute of Applied Mathematics and Mechanics: Shanghai University. Shanghai 200072;
    2. Department of Mechanics, Lanzhou University, Lanzhou 730000, P. R. China
  • Received:1996-03-08 Online:1997-09-18 Published:1997-09-18
  • Supported by:
    Project supported by the Foundation of the Natural Science of China and Gansu Province

Abstract: This paper is devoted to the analysis of the nonlinear Stability of a clamped rodcarrying electric current in the magnetic field which is produced by the current frowingin a pair of inifinitely long parallel rigid wires. The natural State of the rod is in theplane of the wires and is equidistant from them.Firstly under the assumption of apatial deformation, the governing equations of the problem are derived, and the linearizedproblem and critical currents are discussed. Secondly, it ls proved that the buckledstates of the rod are always in planes. Finally. the global responses of the bifurcationproblem of the rod are compuled numerically and the distributions of the deflections.axial forces and bending monents are obtained. The results show that the buckledslates of the rod may be either supercritical or Subcritical. depending on the distancebetween the rod and the wires. Furthermore, it is found that -there exists a limit pointon the branch solution of the supercritical buckled State. This is distinctively differentfrom the buckled slate of the elastic compressive rods.

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