In this paper, we study the partial Fourier method for
treating the Lamé equations in three-dimensional
axisymmetric domains subjected to nonaxisymmetric loads.
We consider the mixed boundary value problem of the
linear theory of elasticity with the displacement u,
the body force f \in (L_2)^3 and homogeneous Dirichlet
and Neumann boundary conditions. The partial Fourier
decomposition reduces, without any error, the
threedimensional boundary value problem to an infinite
sequence of twodimensional boundary value problems,
whose solutions u_n (n = 0,1,2,...) are the Fourier
coefficients of u. This process of dimension reduction
is described, and appropriate function spaces are given
to characterize the reduced problems in two dimensions.
The trace properties of these spaces on the rotational
axis and some properties of the Fourier coefficients u_n
are proved, which are important for further numerical
treatment, e.g. by the finite-element method.
Moreover, generalized completeness relations are described
for the variational equation, the stresses and the strains.
The properties of the resulting system of twodimensional
problems are characterized. Particularly, a priori
estimates of the Fourier coefficients u_n and of the error
of the partial Fourier approximation are given.
| Identifer | oai:union.ndltd.org:DRESDEN/oai:qucosa:de:qucosa:18362 |
| Date | 14 September 2005 |
| Creators | Nkemzi, Boniface, Heinrich, Bernd |
| Publisher | Technische Universität Chemnitz |
| Source Sets | Hochschulschriftenserver (HSSS) der SLUB Dresden |
| Language | English |
| Detected Language | English |
| Type | doc-type:preprint, info:eu-repo/semantics/preprint, doc-type:Text |
| Source | Preprintreihe des Chemnitzer SFB 393, 98-26 |
| Rights | info:eu-repo/semantics/openAccess |
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