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SUMMARYTwo kinds of thin-walled tube elements are presented for transient thermal-structural analysis of large space structures by the finite element method. Not only the average temperature, but also the perturbation temperature in the cross-section of the tube is considered in the present elements. These two temperatures are decoupled in the deduction about the new elements and the non-linear analysis is restricted to solving the equations of average temperature. Therefore, the magnitude of the non-linear analysis can be reduced by the presented method. The main difference between the two kinds of thin-walled tube elements is in the shape functions of the temperature along the circumference of cross-section. Corresponding to the transient temperature field, quasistatic thermo-elastic analysis is also introduced. Three examples are shown and the effectiveness of the new elements is discussed.
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