Abstract:

The boundary of unsteady temperature field is always a large grade area where a dense mesh is necessary. But too many nodes will cost much time in the three dimensional thermal stresses computation. An effective way to solve the problem is introducing p-version hierarchical finite element method to temperature field. The temperature boundary condition and initial value in p-version finite element method are researched and corresponding program is compiled. For a same example, several meshes with different density are computed by traditional finite element method and a sparse mesh is computed by p-version finite element method. The results show that the p-version hierarchical finite element method brings better precision with a coarse grid in unsteady temperature field analysis.

Key words: hydraulic structure, p-version finite elements, hierarchical rank, unsteady temperature field