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Static and dynamic analysis of the Stellatator W7-X.

  • Ludvik, Jan
Publication Date
Jan 01, 2004
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This thesis deals with static and dynamic analyses of the stellatator Wendelstain 7-X that is being built in Grieifwald, Germany. The methods derived in this thesis would be useful also for similar devices like tokamaks. A description of a finite element (FE) model of the W7-X in ANSYS is given. All parts of the W7-X which are considered in the FE model are described and the matter of modelling is discussed. The principles of a computational model build-up are common for both the statics and the dynamics. These models differ only in the density of meshing. The FE model was used for static strength and stiffness calculations that were necessary during W7-X design phase. These static FE calculations are discussed. The FE model was used not only for issues presented in this thesis, but was used for particular problems that originated during the W7-X designing. The theoretic background of the dynamic analysis is discussed. The 1st dynamic problem solved was the modal analysis. A theory of modal analysis together with respect to its implementation in ANSYS is explained. The most important modes of the W7-X are graphically plotted and described. The results of the modal analysis are directly used by a seismic analysis using the response spectrum method. This analysis discovered one meaningful failure mode that was analyzed and some ways leading to its elimination were suggested. / Available from STL Prague, CZ / NTK - National Technical Library / SIGLE / CZ / Czech Republic

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