Abstract
As the core part of a reactor, a spiral pipe structure working under loads of high temperature and high pressure was designed and researched by using CAE method. The properties of high temperature resistance, high-pressure resistance and corrosion resistance play a crucial role for the reactor whether working well or not. Spiral structure was designed for a core component of this reactor in order to increase the staying time that the medium stays in the pipe. The performances of this spiral structure under its working conditions were calculated and analyzed. The changes of performance of the spiral structure caused by changing of elastic modulus of material under high temperature was studied; because the structure has very large length radius ratio, operation of elements meshing is difficult when using FEM method, in order to solving this problem, the methods of establishing elements modal for this kind of structure was proposed in this paper.
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